SMO is the future for high SEO ranking. Google is looking for authority sites for top ten rankings. To get the authority the big G is looking at social linking as a main player. This doesn't discount the old ways of SEO backlinking from articles and such but they are less powerful and many SEO companies are forced to pay more attention to SMO. EMD has lost it's luster and Google looks for EMD thin sites to clean out the top ten. Authority sites look for multiple related keywords on a single site. You must have links going out from your site as well otherwise it indicates a poor site in the eyes of Google. Build a quality site that adds value then promote through Pinterest, instagram, Facebook, Twitter, YouTube, articles, and Press Releases. SEO and SMO differences are being blurred by Google changes.