26. Magnitude of Content Updates
The significance of edits and changes is also a freshness factor. Adding or removing entire sections is a more significant update than switching around the order of a few words.
27. Historical Updates Page Updates
How often has the page been updated over time? Daily, weekly? Frequency of page updates also play a role in freshness.
28. Keyword Prominence
Having a keyword appear in the first 100-words of a page’s content appears to be a significant relevancy signal.
29. Keyword in H2, H3 Tags
Having your keyword appear as a subheading in H2 or H3 format may be another weak relevancy signal. SEOMoz’s panel agrees.
30. Keyword Word Order
An exact match of a searcher’s keyword in a page’s content will generally rank better than the same keyword phrase in a different order. For example: consider a search for: “cat shaving techniques”. A page optimized for the phrase “cat shaving techniques” will rank better than a page optimized for “techniques for shaving a cat”.
31. Outbound Link Quality
Many SEOs think that linking out to authority sites helps send trust signals to Google.
32. Outbound Link Theme
According to SEOMoz, search engines may use the content of the pages you link to as a relevancy signal. For example, if you have a page about cars that links to movie-related pages, this may tell Google that your page is about the movie Cars, not the automobile.
33. Grammar and Spelling
Proper grammar and spelling is a quality signal, although Cutts gave mixed messages in 2011 on whether or not this was important.
34. Syndicated Content
Is the content on the page original? If it’s scraped or copied from an indexed page it won’t rank as well as the original or end up in their Supplemental Index.
35. Helpful Supplementary Content
According to a now-public Google Rater Guidelines Document, helpful supplementary content is an indicator of a page’s quality (and therefore, Google ranking). Examples include currency converters, loan interest calculators and interactive recipes.
36. Number of Outbound Links
Too many dofollow OBLs may “leak” PageRank, which can hurt search visibility.
Images, videos and other multimedia elements may act as a content quality signal.
38. Number of Internal Links Pointing to Page
The number of internal links to a page indicates its importance relative to other pages on the site.
39. Quality of Internal Links Pointing to Page
Internal links from authoritative pages on domain have a stronger effect than pages with no or low PR.
40. Broken Links
Having too many broken links on a page may be a sign of a neglected or abandoned site. The Google Rater Guidelines Document uses broken links as one was to assess a homepage’s quality.