How about this for a reason: one third of people on Twitter follow at least one brand. Still not convinced? What if I told you that studies have shown that the vast majority (67 percent) of Twitter users are more likely to buy from the brands that they follow on Twitter, that almost four in five (79 percent) recommend those same brands and 69 percent go to follow other brands based of the recommendations of others.

This infographic from Search Engine People looks at how and why Twitter has evolved as a viable marketing platform for small business.

(Source: Search Engine People.)