70. SSL Certificate (Ecommerce Sites):
Google has confirmed that they index SSL certificates . It stands to reason that they’ll preferentially rank ecommerce sites with SSL certificates.
71. Terms of Service and Privacy Pages :
These two pages help tell Google that a site is a trustworthy member of the internet.
72. Duplicate Content On-Site:
Duplicate pages and meta information across your site may bring down all of your page’s visibility.
73. Breadcrumb Navigation:
This is a style of user-friendly site-architecture that helps users (and search engines) know where they are on a site:
Both SearchEngineJournal.com and Ethical SEO Consulting claim that this set-up may be a ranking factor.
74. Mobile Optimized:
Google’s official stance on mobile is to create a responsive site. It’s likely that responsive sites get an edge in searches from a mobile device.
here’s no doubt that YouTube videos are given preferential treatment in the SERPs (probably because Google owns it ):
In fact, Search Engine Land found that YouTube.com traffic increased significantly after Google Panda.
76. Site Usability:
A site that’s difficult to use or to navigate can hurt ranking by reducing time on site, pages viewed and bounce rate. This may be an independent algorithmic factor gleaned from massive amounts of user data.
77. Use of Google Analytics and Google Webmaster Tools:
Some think that having these two programs installed on your site can improve your page’s indexing. They may also directly influence rank by giving Google more data to work with (ie. more accurate bounce rate, whether or not you get referall traffic from your backlinks etc.).
78. User reviews/Site reputation:
A site’s on review sites like Yelp.com and RipOffReport.com likely play an important role in the algorithm. Google even posted a rarely candid outline of their approach to user reviews after an eyeglass site was caught ripping off customers in an effort to get backlinks.
79. Linking Domain Age:
Backlinks from aged domains may be more powerful than new domains.
80. # of Linking Root Domains:
The number of referring domains is one of the most important ranking factors in Google’s algorithm, as you can see from this chart from SEOMoz (bottom axis is SERP position):
81. # of Links from Separate C-Class IPs:
The total number of linking pages — even if some are on the same domain — is a ranking factor.
83. Alt Tag (for Image Links) :
Alt text is an image’s version of anchor text.
84. Links from .edu or .gov Domains:
Matt Cutts has stated that TLD doesn’t factor into a site’s importance. However, that doesn’t stop SEOs from thinking that there’s a special place in the algo for .gov and .edu TLDs.
85. PR of Linking Page:
The PageRank of the referring page is an extremely important ranking factor .
86. Authority of Linking Domain:
The referring domain’s authority may play an independent role in a link’s importance (ie. a PR2 page link from a site with a homepage PR3 may be worth less than a PR2 page link from PR8 Yale.edu).
87. Links From Competitors:
Links from other pages ranking in the same SERP may be more valuable for a page’s rank for that particular keyword.
88. Social Shares of Referring Page :
The amount of page-level social shares may influence the link’s value.
89. Links from Bad Neighborhoods:
Links from “bad neighborhoods” may hurt your site.