Quality Trumps Quantity as Content Re-emerges as King. SERP ranking signals are increasingly moving from being “quantity” based, i.e., keyword rankings and number of links, toward
being “quality” based. Quality is being determined by a number of factors, including author trust (as evidenced by the expansion of Google’s Rel=Author/AuthorRank program in 2012), as well as content authority, freshness, relevance, and depth.
"Social endorsements are becoming a key influence as search engines look for site content that is important to web visitors as evidenced by likes, tweets, and shares."
