Source: http://searchenginewatch.com/sew/how-to/2428675/which-ranking-factors-are-important-for-mobile-sites
It didn’t quite turn out to be as the “mobilegeddon” that a number of people had predicted several months after Google’s release of the mobile-friendly update. But it sure had an impact to today’s search results when you look at the correlation between ranking factors and the appearance of the mobile search engine results pages (SERPs). Here are some of the important ranking factors for mobile sites:
mobile ranking factors
User Experience
– Bigger fonts
– Both responsive design and dedicated mobile versions of websites (m.domain.tld or mobile.domain.tld) rank in the mobile SERPs
– Fewer interactive and structural elements; few bullets than in desktop, more often, unordered lists are used
– Less ads
– Less internal links
– Less images than desktop
Technical Factors
– 1.17 seconds = average load time in the mobile top 30
– 1.10 seconds = average load time in the mobile top 10
Backlinks
– Backlinks are less of a ranking factor in mobile than on desktop
– This year, the number of nofollow backlinks has increased, but is still below desktop value
– Due to the separate mobile site versions, results in mobile are linked much less frequently to news pages. Desktop counterparts are the ones normally linked to news sites.