The eternal question: How much time does it take for a link to affect rankings? If you're an SEO, chances are, you've recommended link building as a tactic. And I've been using HARO a lot recently to build backlinks.
Backlinks effect SEO in a very strange way. Too much Backlinks: How does a website give me one? So how does this Backlink actually affect my ranking?.
5 Things to Think About When Considering The Impact of Social on SEO authority are out, but does Google consider links published on social accounts to be credible backlinks? . Okay, your turn: How else do you think social affects SEO?.