The SEO folks at Moz have released their official survey of professional SEMs (search engine marketers) for what they believe the top 10 search engine factors for Google are in 2015. We have to rely on the experts, since Google won“t give us the skinny!
We can say anecdotally that our recent experience tells us this is a fairly accurate list, though we tend to think that for our clients, who tend to be small businesses, and small- to medium-sized organizations and nonprofits, on-page factors such as keywords and descriptions and page titles are probably more important than for larger corporate sites with higher trust scores and far more linking domains.
Get the details here: https://moz.com/search-ranking-factors
