Pete Meyers from Moz revealed that HTTPs pages on the front page of Google search results could reach 50% by late May/early June 2017. When comparing Semrush to Moz, the two are very similar. If your site is too slow to load or slow to interact with, Google is more likely to reduce your rankings, especially when your competitors have fast site speed and great content. The Process. External links are almost always present for competitive searches. Owners can respond to reviews via this popup or the Google Business Profile dashboard. Moz was the first & remains the most trusted SEO company. Google MapMaker was closed down in 2017. Google makes money off of their paid ads. We are testing whether Facebook shares provide any increase in predictive power beyond these factors. The higher your PageRank score is, the more likely it is to rank for a given target keyword. So it isn't a metric that will improve your ranking in the search engine. In a 2016 Q&A, Google representatives revealed that content and links are the top two factors influencing the rankings, and in the 2020 Twitter discussion we’ve already mentioned, John Mueller. Some SEO experts believe that linking out to authority sites sends trust signals to Google, thus improving ranking. Move over, links, content, and RankBrain — there's a new ranking factor in town, and it's a doozy. 71- Contact page : According to the Google guidelines document, they prefer sites with an “appropriate amount and contact information”. Review count, sentiment, velocity, and owner response activity are all speculative ranking factors. As Danny Sullivan put it, if you consider the Google algorithm as an engine, Panda and Penguin are algorithm changes that were like putting a new part in the engine such as a filter or a fuel pump. According to the Moz study referenced earlier, personalization signals make up 9% of SEO ranking factors. The author's views are entirely their own (excluding the unlikely event of hypnosis) and may not always reflect the views of Moz. Review Factors. In this Whiteboard Friday, Rand goes through ten things commonly believed. Thanks to Google’s mobile-first index, you must optimize your website for mobile if you want to boost your rankings. As of 2023, it sits at 8%. Ahrefs DR (Domain Rating) is a metric that measures the authority of a website’s backlink profile on a scale of 0 to 100. And high CTR is still at. Google Ranking Factors: What Really Matters Right Now . On-page Factors. Metric #1: SERP CTRContent SEO Ranking Factors. 3. Confirmed. Google. Northcutt: Google Ranking Factors. 1. Go to Google Chrome Web Store. What makes this so interesting is that the Moz. Not everyone is as obsessed about tracking changes to the Google search results as we are. Factors 1-47: Statistical Spearman Correlation -0. 9)All Links Are Not Created Equal: 20 Graphics on Google's Valuation of Links. In Backlinko’s guide to SEO in 2022 , Brian Dean points out that Google’s Quality Rater Guidelines says the creator of the main content plays a role in your ranking. You can also look at things that rank for their own title. YouTube Ranking Factors. For example, if a user searches “How. Citation Factors. How to Rank On Google. According to SEMRush's research 'Ranking Factors 2. A well-documented. As we said above, DA is measured from 1 to 100. Go to the Internal link opportunities tool. Google uses over 200 different factors to determine rankings. Yet, the first time a Google representative said online that links were a ranking factor was in 2016. A MozRank of 2 can rank just as easily as a MozRank of 9 depending on the circumstances. We’ll start by looking at precisely what a BBB. 10. Across the board, what we've seen is that paid searches on average, in all of Google, gets between 2% and 3% of all clicks, of all searches result in a paid click. According to CIO, backlinks are the second most important ranking factor, after content relevance; whereas Moz declares page- and domain-level back-links to be the most influential ranking factors. DA scores range from one to 100. Moz Local for Small Business : Help maximize the online visibility of your small business with Moz Local. The following are the top on-page ranking factors that can affect your website's search visibility: title tags, meta descriptions, on-page content, internal links, URL structure, header markup, alt. This is also sometimes called “site authority. Announced at SES Boston, this was the first named Google update. Build More High-Authority Links. Pigeon Expands (UK, CA, AU) — December 22, 2014. 8. So it’s no surprise that Google has been measuring the speed of your site and using that in their ranking algorithms since 2010. Optimizing videos around these keywords can help you rank higher in. These ranking factors serve as useful guidelines for SEO’s and content marketers to optimize their. I admit that I did not know how the myth of "200 Google Ranking Factors" was created, but a good SEO pal of mine, Giorgio Taverniti, revealed it to me. Of that revenue, $19. 4% of top-ranking pages don’t have a title tag. Instead of revising individual pages, fresh websites often add completely new pages over time. On April 21, 2015, Google rolled out their mobile-friendly. You typically have two options: manually close them or hire a listing service like Moz Local to fix them for you. A variety of negative outcomes can arise from the presence of duplicate listings, detracting from your local business' ability to rank well and win customers. Google’s traditional ranking factors still 100% apply to local. There are many Google page ranking factors, and while these don’t change that often, some shift in value over others, meaning that there are new Google ranking factors to consider. Recent research suggests that “high-quality backlinks account for 30% of your overall page score in Google. So these are things where a lot of the posts that you might read, for example, if you were to Google "ideal blog post length" or "ideal publishing frequency" will give you data and information that come from these sources of here's the average length of content of the top 10 results in Google across a 5,000-keyword set, and you can see that. If you can provide an easier search solution than Google, that gives the user a reason to search your site instead of going back to Google, which counts as a bounce. By and large, the survey focused on Google local ranking factors to the exclusion of other search engines, given Google’s global dominance outside of China. 4 percent of global traffic. 2. 1. Local SEO: Google is going to increase monetization. Review Factors. Reviews. HTTPS as a rankings boost. 14K. 75% of searchers never click past the first page of results. A site’s Domain Authority score is on a logarithmic scale that runs from 1 to 100. One of the two most important Google ranking factors (along with links). That’s one of the many conclusions drawn by more than three dozen local SEOs who have come together in the 2017 Local Search Ranking Factors survey, just published today. Let’s take a look at some of the most important Google ranking factors so you can learn how to increase your SEO ranking on Google. Go to “More Tools” and then “Extensions. I admit that I did not know how the myth of "200 Google Ranking Factors" was created, but a good SEO pal of mine, Giorgio Taverniti, revealed it to me. Initially, the effects of Panda were mild, but in January 2016 it was permanently incorporated into Google’s core algorithm. 4 Comments. It was developed by Ahrefs, a popular SEO tool provider, and was first introduced in 2016 as an alternative to other domain authority metrics like Moz’s Domain Authority. Search engine optimization (SEO) is the process of improving the quality and quantity of website traffic to a website or a web page from search engines. In-depth articles. But unlike the Searchmetrics. A guide to Google Search ranking systems. It is a factor. Moz Local: A location data and. Google Search Central, Google Search’s reviews system and your website. It enhances the perception of your site's expertise, trustworthiness, and relevance, helping you. (To put that into context, Google Penguin only impacted 3. Keyword Match: Exact keyword. This feature is going to affect 7% of all searches, which is a massive number. Giomelakis and Veglis (2016) believe that this interaction metric plays a significant role in organic search results as it measures, single-page visits. " Via Moz’s 2013 Search Ranking Factors $100 says that if we could get more comprehensive brand mention data, this correlation would start to look a lot like links 11. That new engine still makes use of many of the old parts (such as Panda. Direct ranking signal, my page takes eight seconds to load. On-page SEO is anything you can do on the page itself to improve its rankings and visibility. User Satisfaction ("Last Click"): the holy grail of SEO, and, ultimately, the experience Google strives to deliver in its search results. Mobile-First Optimization. While site speed is not a factor in Google’s Mobile First Index quite yet, Google is working on rolling it out. If users like the new algorithm better, it stays. Local Search Ranking Factors : Explore all the signals Google uses to rank local businesses. The survey asked respondents to rate many different factors on a scale of 1-10 according to how important they thought they were in Google's ranking algorithm. Pete Meyers from Moz revealed that HTTPs pages on the front page of Google search results could reach 50% by late May/early June 2017. On the flip side… Dr. Ahrefs DR is based on the number and quality of. The idea of ranking domains based on their authority emerged from PageRank was introduced by Larry Page (one of Google’s Founders) and it is used. ” (We explore a more fact-based definition of this later in this post. Google has been creeping closer to going fully mobile-first for years. We can summarize these principles into 3. Check to see if your business was already added to the GBP listing. Corey Northcutt’s company has put together by far the most useful – and usable – source of. The 8 Types of Local Search Ranking Factors. There are hundreds of ranking factors Google’s algorithm considers in response to searches, and they are constantly updating and refining their process. 5. To rank higher on SERPs, it is SUPER important to know which of these factors are proven and pivotal to follow and which ones are controversial and rooted in SEO speculation. In order to identify sources of links that are delivering link equity, I set the parameters above the list as follows: Link type - Follow, Links Status - Active. Whitesparkconducted the research and the study, in partnership with Moz, pooling expert opinions of top Local SEOs around the globe to determine which elements are believed to. Domain Authority refers to the overall ‘power’ of your website, which is determined by the number and quality of backlinks pointing to your site. Moz's 2015 Search Engine Ranking Factors presents survey data from over 150 marketing professionals specializing in Search Engine Optimization. Craft a data-driven outline. Did You Know Top SEO Google Ranking Factors In 2017 Albert Taylor Blogger at Independent Published Aug 3, 2017 + Follow A few of the best SEO Analytics. Image optimization. Sneak preview of some key takeaways from the 2017 Local Search Ranking Factors SurveyThe survey is broken out into two main sections: Local pack ranking factors (elements that affect search results that appear in the local 3-pack/snack pack). March 2016: Google Senior Search Quality Strategist Andrey Lipattsev confirms that content and links are the first and second greatest ranking factors. Now the quality raters do not have the power to put a penalty on your. Now they’re part of the Page Experience signals. But, Hummingbird wasn't just a new part; it was a completely new engine. People say all kinds of things are ranking factors. These factors are based on over a decade of analysis, experience, research, and. 14 to -0. Moz’s tool allows businesses to check Domain Authority to “predict how likely a website is to rank on search engine result pages (SERPs). 15 years ago the overall PageRank score of a site could cause a bias in Google search results that favored sites with a large amount of PageRank. In general, the more valuable a keyword is, the more people compete for it. Moz Domain Authority, Explained. If you have some spare time I. Google is quite a bit smarter than that and has even moved way beyond this next formula with TF-IDF. ) Idea 2: The Moz metricThese guidelines are a document that Google has provided to this whole army of quality raters. Matt Peters and the Moz Data Science Team measured the correlation between Google +1s and higher rankings. The Domain Authority metric was developed by Moz, but other companies have created similar metrics that rank domains based on a number of factors and give them a rating from 0 to 100. We regularly improve these systems through rigorous testing. Google takes inbound links as votes of confidence in your site’s authority and relevancy. Today I am going to share some of what I found. 7. ”. That’s a 32% increase since the 2017 survey. Create a Google Business Profile page for your company. The origin of the myth. 3 Bounce rate (BR) According to Zhang and Cabage (2017), one of the metrics that should be observed to capture visitors' engagement is the BR. Click on the blue button that says “Manage now” (be sure you are signed into your Google account). While Domain Authority isn’t an official ranking factor (again, it’s a Moz metric), it is a representation of two things that are: E-A-T and backlinks. Page-1 HTTPS results topped 45% in our 10K tracking set. Content that ranks well is in-depth and covers a broad spectrum of its respective subject. DR 20–40: 603 ref. Mobile User Experience; Google announced in 2015 that mobile-friendliness would be incorporated into the ranking algorithm. Domain Authority and Page Authority (DA/PA) are indicators developed by MOZ, a very respectable and reputable digital company, which predicts how well a page will rank in search engine results. Google and other major search engines consider backlinks as “votes of. Top 11 Google Ranking Factors for 2020. Using a combined analysis of dozens of sources, including: Ranking factors studies. Domain Authority (DA) is a search engine ranking score developed by Moz that predicts how likely a website will rank in search engine result pages (SERPs). “All the fancy footwork in the world won’t get you anywhere. Rand Fishkin Founder, CEO, Author at SparkToro. 9) Link Popularity of Site in Topical Community (3. Your site’s link profile is impacted by both the number of external links to your site – links to your website from other websites – and the quality of those links. In the Moz article titled Should You Pay for Local Listings Management? by Miriam Ellis, she makes this statement: "Prominence, proximity, and distance are the three types of factors Google tells us it takes into account when ranking local businesses. As many as 46% of all Google searches are local. With billions of searches conducted daily, higher rankings mean greater visibility, leading to increased organic traffic and potential business growth. This human-edited directory of websites launched June 5, 1998 and closed March 17, 2017. Domain authority is a metric which was created by Moz (SaaS company), for the purpose of rating a website on a scale of 1-100, (100 being the best and 1 being the worst). A/B testing. It’s content, and links pointing to your site. The study consists of two parts: a survey of professional SEOs. This is a surprising departure. The evolution of the search, and the results we all click on, is perhaps the more easily identifiable ways to track changes in Google search. 2017 Google Algorithm Updates. If the search query and the phrases that are related to the search query appear on the page, there’s a high chance the page is relevant for the user. These two tell Google that the site is owned by a trustworthy person. Direct visits and engagement metrics. This is important because we know Google uses keywords found in your title tag for ranking purposes. Expertise, authority, trust, and user experience (e. Medium ($179/month) — 1500 trackable keywords across 10 projects. Ahrefs DR is based on the number and quality of. Content freshness is one of the most important SEO ranking factors. The importance of Google ranking factors lies in their role in determining a website’s position in search results. So these would be like the 5 or 10, or if you're bigger, maybe 50 keywords that you know have image blocks in them, or that you know get lots of image searches, and therefore you're trying to target them. Moz On Clicks Influencing Search Ranking. After Page Authority, a URL's. Speed has played a role in search engine ranking factors for many years, and now with Google's Core Web Vitals update, it's top of mind for many SEOs. 5 billion, a 21% year-over-year increase. Title Tag Starts with Keyword: According to Moz, title tags that begin with a keyword tend to perform better than title tags where the keyword appears at the end of the tag. The author's views are entirely their own (excluding the unlikely event of hypnosis) and may not always reflect the views of Moz. In a Q&A with Ammon Johns and others, Google Search Quality Senior Strategist Andrey Lipattsev. This means even if Google doesn’t display your exact meta title in search results, they can still use the words found in your title to rank your website. , o. Search for jobs related to Search engine ranking factors 2017 moz or hire on the world's largest freelancing marketplace with 22m+ jobs. We collect data from thousands of sites and. 2014 google-ranking-factor-by-moz Vizion SEO - Google Local Search SEO. Creating your Google+ Local page for your local business is your first step to being included in Google's index. SEO experts have debated the relevance of Google Analytics bounce rate to search engine ranking for years. Step 3: Navigate to the "Inbound Links" tab. This human-edited directory of websites launched June 5, 1998 and closed March 17, 2017. Assume Google ignores 50% of your links, and only 50% of your links are good. Google Maps: Google's proprietary mapping service. Research from analyzing 1 million search results found “that HTTPS correlated with higher rankings on Google’s first page”. At this point, you might expect to find a 28-point web speed checklist, but that's simply not the case. 1. Google will ignore or devalue links for many reasons. Just released: 2017 Local Search Ranking Factors survey results After taking a year off, latest version of survey again features educated opinions from almost. Find the low-hanging keywords (the ones that are on the second and third pages of Google SERP) with high search volume. The result is many website owners optimizing for lower bounce rates in hopes of improving their ranking, while lower bounce rates don’t simply translate into higher rankings. If you want to rank for anything that's even remotely competitive, the chances of finding a website ranking without external links is very rare indeed. The essential SEO toolset: keyword research, link building, site audits, page optimization, rank tracking, reporting, and more. Ranking factor or not, you can’t improve dwell time because there’s no way to calculate it. It was starting at about mid-November. The bar moves with just a click of a button. Remember, quality beats quantity every time. I put this from 3 to 2 and this one from 32 to 31. All around the world, people are searching: X sits at a computer high above the city and searches dreamily for the best beaches in Ko Samui. Apr. This week for Whiteboard Friday we are taking a look at how to get a video to rank on YouTube. This year's survey allowed for a higher level of response granularity as it allowed contributors to rank all 149 possible factors that could impact search results. SHARES. There is a ton of detail to ranking in the SEO world, to try and rank in Google's results. Another crucial ranking factor for Google is how well your content matches a user’s search intent. " - Darren Shaw. Top 11 Google Ranking SEO Factors. Search engine spiders can estimate your site speed fairly accurately based on a page’s code and filesize. Think about it: If your site’s domain authority is 32 and you get a link from a site with a domain authority of 75, this will contribute to increasing yours. Years ago, Moz started to do this work with correlation stuff, and now many, many companies put these out. Moz’s guide on the topic; Google’s own interactive graphic; Now, back to. a) Keyword Optimization. Premium ($599/month) — 4500 keywords and up to 50 projects. Domain Authority was launched by Moz shortly after its inception in 2004. Step #3: Review the Keyword Ideas. Relevance Relevance is a one of the most critical factors of SEO. By Loren Baker . They act like votes of confidence. “The core essentials in 2021 will remain about the same — every SEO needs to understand the fundamentals of crawling vs. 7% of pages will rank in the top 10 search results within a year of publication. Typically they did this by adding more words to make the title longer. The more high-quality backlinks you have, the higher. May 3, 2015, it happened again. READS. Maybe I move up. Mobile User Experience; Google announced in 2015 that mobile-friendliness would be incorporated into the ranking algorithm. Spearman’s rank correlation is used, as we’re comparing ranked variables (organic ranking) with logarithmic (ish) metrics like DA, and variables with extreme high-end. Outbound for Link Theme. Domain Authority is a metric developed by Moz (well-known SEO software company) that scores a website based largely on the quality and number of that website’s inbound links. Mobile-First Optimization. There are likely millions of pages for each search query, so Google has to prioritize the ones that offer quality content and. Select “ Video ,” “ Featured video ,” and “ Video carousel . Your website is a house. Moz has released the results of its 2015 Ranking Factors study, which aims to identify the page attributes most closely associated with a high ranking in Google. Don’t obscure the entire page with interstitials. Report. " Chances are that my two-factor algorithm would rank only car sites in the top 10, but Google knows that many people that type that query want information on the animal. After taking a year off in 2016, Moz is back with its 2017 survey of local search ranking factors. A page’s title tag can be displayed as part of the search snippet in a search engine results page (SERP). So, we have compared our experience with the most current lists on the top search engine blog sites to bring you 5 of the most important google ranking factors this year—2017. but it’s been on my mind recently as I think about the ways machine learning should make Google rankings ever more of a black box, and cause the ranking factors. Mike Obrien Date published August 13, 2015 Categories SEO Yesterday, Moz released its largest-ever study on ranking factors. Google has the unique QDF (query deserves freshness) algorithm. Domain Authority (DA) is a search engine ranking score developed by Moz that supposedly predicts how well a website will rank on search engine result pages (SERPs). 1. It defines the type of content that should be updated frequently. But there are hundreds of additional signals Google looks at. Check your results. Before joining Semrush he was Investment Director of Target Global from March 2016 to March 2017. Top 200 Most Statistically Significant Factors for Ranking on Google. July 18, 2015 Panda 4. They're usually called something like ranking factors or ranking elements study or the 2017 ranking factors, and a number of companies put them out. 1. I know this is the Local Search Ranking Factors, and we’re. Localized organic. After all, SEO is mostly about getting that #1 spot, specifically on Google. Do continue to fix broken links, because we don't know which links Google isn't counting, and there are several, often many instances where it does work and you can see a benefit. READS. Negative and positive reviews in Google, Yelp, or Bing. If you monitor crawlbot traffic to your site, you may see an increase in traffic from Smartphone Googlebot, and the. Fascinating SEO Stats Cherry-Picked by Our Editor: 68% of all online activities start with a search engine. So Google withdrew it from public view, but continued to rely on it for its ranking algorithms. But don't forget those lower Organic CTR scores for identifying other SEO opportunities. Consider that with the release of the Local Search Ranking Factors 2017 study,. Keyword in Sub-domain: This is an important Google Ranking Factors as Moz’s 2011 panel agrees that a sub-domain containing the keyword can boost the ranking of a website in SERP. ) Websites that add new pages at a higher rate may earn a higher freshness score than sites that add content less frequently. Presumably, Google relied on desktop page speed until then, and the rollout of the mobile-first index has resulted in them adding in speed as a factor there. Video transcription by Speechpad. This is also sometimes called “site authority. So there’s a lot of truth to that old adage. Backlinks are the lifeblood of SEO today, just as they were 10 years ago. Additional Articles on Local SEO. Google currently has over 85% of the search engine market ( Statista) To win at search engine optimization, you have to play by Google's rules. 9. With over 200 Google ranking factors, there are a multiplicity of reasons why a site’s Google ranking might suffer an abrupt plunge. , page speed and mobile friendliness). Off-page SEO is a strategy that involves actions taken outside of your website to improve your search engine rankings. Moz’s data (and independent research by leading SEOs around the world) strongly suggests a direct correlation between strong link profiles and higher organic rankings. Google holds 86. If they search on your site, you have engaged them. So, just how important is your website’s ranking, and how is it calculated?UX matters, for real now. The 8 Types of Local Search Ranking Factors. 86% of the search engine market ; The #1 result in Google gets approximately 32% of all clicks ; 49% of marketers report that organic search has the best ROI of any marketing channel (Search Engine Journal) Organic search results that rank. Here's a complete guide to YouTube optimization, ranking factors, search volume, analytics, etc. In the fourth quarter of 2021, mobile traffic accounted for 54. So, without further ado – let’s briefly take a look at the most important ranking factors for local search: Your Google My Business profile. In a Q&A with Ammon Johns and others, Google Search Quality Senior Strategist Andrey Lipattsev. The first step in building the dataset is selecting a list of keyword queries. This is an important one—not only because of Google image search but also because regular search results are getting more and more visual—especially on mobile. Confirmed. If there’s another website that you just can’t seem to outrank, their stronger link profile is. If your page has a MozRank of 2 and every other competing page has a MozRank of 1, then your page will likely rank higher than all of them. According to Moz’s 2017 Local Search Ranking Factors report, review signals are believed to account for approximately 13% of how Google decides to display local search results in the “Local Pack” results, the small list of businesses displayed beneath the Maps result in some searches:1) The Owner Sets The Review Stage. Page load speed, a very small ranking factor, but as Google says a direct one. ”. 2015 Google Algorithm Updates RankBrain (Oct. My presentation, Does Google Still Need Links, looked at the available evidence on how and to what extent Google is using links as a ranking factor in 2017, including the piece of research that I’m sharing here today. Backlinks. Moz released their local search ranking factors study results for 2017. Of course, we know that this aggregation of opinion is likely missing out on many factors and may over or under. The new article looks like this, with updated content depth, modern branding, and inline visuals. Systems, Signals, And Page Experience The most important thing you can do if you are worried about ranking is write content. If your page isn’t ranking where it should, you can always improve it. Personalization Ranking Signals. Personalization Factors. #1. According to our research, 24 website characteristics came up as factors affecting any website’s ranking, with the most references mentioning quality and quantity of backlinks, social media. Download the report for further analysis and view the numbers in the light of how Google might adjust proximity based on new factors like curbside pickup and local delivery. Mobile-Friendly As A Google Ranking. And it’s likely that site speed as a ranking factor in mobile search gets released at some point in 2017, so site speed will soon be an official ranking factor across the entirety of Google search. Website Domain Authority. There was a recent ‘ phantom update ,’ and SEOs posted observations and changes since the possum and. Link Factors. The results were surprising. Here's the amazing thing, though — 51% of search results have at least one. 70% to 80% of users completely ignore paid ads. As a marketer you may notice evolution. However, recently,. The author's views are entirely their own (excluding the unlikely event of hypnosis) and may not always reflect the views of Moz. Sixty-three percent of Google’s US organic search traffic originates on mobile, and as of September 2020 the search engine has shifted to mobile-first indexing for all websites. Search Intent and Content Relevancy. READS. On-page factors in general can be spammed – that’s why Google added links to the mix. We don’t have any special access to the internal workings of Google’s local search algorithm. ) Let’s see how to optimize for this new Google ranking factor. In 2018, Google launched the so-called ‘Speed Update,’ making page speed a ranking factor for mobile searches. To determine which number corresponds to which category, navigate to the category on Amazon and find the number Amazon uses in the node parameter in the URL. So the higher the domain authority of a website, the higher its ranking in search engines. Write the post. That being said, backlinks are not created equal. SEO statistics for strategy. After taking a year off in 2016, Moz is back with its 2017 survey of local search ranking factors. Google Algorithm Updates 2017 December 20, 2017 Maccabees Update. DR 0–20: 20 ref. Here is a complete list of top Google Ranking Factors generally agreed upon by SEO experts based on Google's patents and announcements. Optimizing your web presence for personalization means creating relevant content for. Reply M. Page Loading Speed via HTML: Both Google and Bing use page loading speed as a ranking factor. Domain Authority (DA) is a metric developed by Moz that predicts how. According to the Moz survey, Google My Business “signals” (proximity, categories, keyword in business title, etc. The Professional's Guide to SEO: Understand how Google thinks. Here's why.