Obligatory: <a href="http://en.wikipedia.org/wiki/Betteridge%27s_law_of_headlines" rel="nofollow">http://en.wikipedia.org/wiki/Betteridge%27s_law_of_headlines</a><p>That said, I think the real answer is "it's complicated". I'm pretty some businesses benefit from Social Media, but I expect there are a lot of variables that affect how much value they derive from it.<p>It also depends on how, exactly, you define "social media". It's become a bit of a catch-all term these days, and to the extent that it's been very generalized, I'd argue that the answer to the posed question is even more "No".<p>Anyway, FWIW, one more anecdote for you... so far the vast majority of the traffic to our blog and our website is traffic from links submitted here at HN, on Reddit, through Tweets, posted on G+, Facebook and LinkedIn, etc. We spend essentially nothing (other than a little bit of my time) on this, but I believe it is increasing our exposure and brand awareness. Social Media activity also seems to contribute to generating backlinks, which improve our positioning with the search engines.<p>We're still "pre revenue" so it doesn't make sense to talk about the ROI of our social media efforts yet, but my impression is that it's a valuable part of our effort to get the word out, without spending a pile of money.<p><i>shrug</i>