Back links have always been an important part of SEO, but the type of links that influence search engine rankings have changed over the years. Links from topically relevant and authoritative sites serve as signals of quality for the content they point to. The authority of a web page, or ?Page Rank? in Google lingo, [...]
Source: http://www.getelastic.com/social-link-building-the-latest-fashion-in-seo/
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