social media explained with donuts //While I quibble with a phrase or two, certainly clever &amp; succinct. Pinterest is all about the visual; Twitter is about conversation &amp; curation of information. Twitter as micro blog is no longer about &quot;what am I doing?&quot;...it&#x27;s about building relationships. The hash tag is a powerful organizer of interests. See Mashable&#x27;s Guide to Twitter for more info.