You might already know that Google uses over 200 ranking factors in their algorithm…

But what the heck are they? Well, you’re in for a treat because Brian Dean has put together a complete list. Some are proven. Some are controversial. Others are SEO nerd speculation.

Brian recently updated this entire list for 2019.

1. Domain Age: Google’s Matt Cutts states that: “The difference between a domain that’s six months old versus one year old is really not that big at all.” In other words, they do use domain age…but it’s not very important.

2. Keyword Appears in Top Level Domain: This doesn’t give the boost that it used to. But having a keyword in your domain still acts as a relevancy signal.

3. Keyword As First Word in Domain: A domain that starts with their target keyword has an edge over sites that either don’t have that keyword in their domain (or have the keyword in the middle or end of their domain).

4. Domain registration length: A Google patent states: “Valuable (legitimate) domains are often paid for several years in advance, while doorway (illegitimate) domains rarely are used for more than a year. Therefore, the date when a domain expires in the future can be used as a factor in predicting the legitimacy of a domain.”

5. Keyword in Subdomain: Moz’s expert panel agrees that a keyword appearing in the subdomain can boost rankings.

6. Domain History: A site with volatile ownership or several drops may tell Google to “reset” the site’s history, negating links pointing to the domain. Or, in certain cases, a penalized domain may carry the penalty over to the new owner.

7. Exact Match Domain: Exact Match Domains may still give you slight edge. But if your EMD happens to be a low-quality site, it’s vulnerable to the EMD update.

8. Public vs. Private WhoIs: Private WhoIs information may be a sign of “something to hide”. Googler Matt Cutts is quoted as stating: “…When I checked the whois on them, they all had “whois privacy protection service” on them. That’s relatively unusual. …Having whois privacy turned on isn’t automatically bad, but once you get several of these factors all together, you’re often talking about a very different type of webmaster than the fellow who just has a single site or so.”

9. Penalized WhoIs Owner: If Google identifies a particular person as a spammer it makes sense that they would scrutinize other sites owned by that person.

10. Country TLD extension: Having a Country Code Top Level Domain (.cn, .pt, .ca) can help the site rank for that particular country… but it can limit the site’s ability to rank globally.

11. Keyword in Title Tag: Although not as critical as it once was, your title tag remains an important on-page SEO signal.

12. Title Tag Starts with Keyword: According to Moz , title tags that starts with a keyword tend to perform better than title tags with the keyword towards the end of the tag.

13. Keyword in Description Tag: Google doesn’t use the meta description tag as a direct ranking signal. However, your description tag can impact click-through-rate, which is a key ranking factor.

14. Keyword Appears in H1 Tag: H1 tags are a “second title tag”. Along with your title tag, Google uses your H1 tag as a secondary relevancy signal, according to results from this correlation study:

15. TF-IDF: A fancy way of saying: “How often does a certain word appear in a document?”. The more often that word appears on a page, the more likely it is that the page is about that word. Google likely uses a sophisticated version of TF-IDF.

16. Content Length: Content with more words can cover a wider breadth and are likely preferable in the algorithm compared to shorter, superficial articles. Indeed, one recent ranking factors industry study found that content length correlated with SERP position.

17. Table of Contents: Using a linked table of contents can help Google better understand your page’s content. It can also result in sitelinks.

18. Keyword Density: Although not as important as it once was, Google may use it to determine the topic of a webpage. But going overboard can hurt you.

19. Latent Semantic Indexing Keywords in Content (LSI): LSI keywords help search engines extract meaning from words that have more than one meaning (for example: Apple the computer company vs. Apple the fruit). The presence/absence of LSI probably also acts as a content quality signal.

20. LSI Keywords in Title and Description Tags: As with webpage content, LSI keywords in page meta tags probably help Google discern between words with multiple potential meanings. May also act as a relevancy signal.

21. Page Covers Topic In-Depth: There’s a known correlation between depth of topic coverage and Google rankings. Therefore, pages that cover every angle likely have an edge vs. pages that only cover a topic partially.

22. Page Loading Speed via HTML: Both Google and Bing use page loading speed as a ranking factor. Search engine spiders can estimate your site speed fairly accurately based on your page’s HTML code.

23. Page Loading Speed via Chrome: Google may also use Chrome user data to get a better handle on a page’s loading time. That way, they can measure how quickly a page actually loads to users.

24. Use of AMP: While not a direct Google ranking factor, AMP may be a requirement to rank in the mobile version of the Google News Carousel.

25. Entity Match: Does a page’s content match the “entity” that a user is searching for? If so, that page may get a rankings boost for that keyword.

26-100 are here:

The source for the above story is at