Social media metrics are definitely tricky; after all, what exactly are we measuring and what does success even look like? I don't have a definitive answer to these questions even though I am a social media & community specialist at an association. Here are some of the things I track:1) Click-throughs on links we tweet and post on Facebook. 2) Amount of website traffic coming from social sites. Out of almost 7,000 sources, Facebook is #21 and Twitter is #70 in terms of referring traffic to our site: I'd say that's pretty convincing evidence that posting to those sites is worth it.3) Number and source of re-tweets. 4) Number of fans on Facebook and level of engagement on our page.5) Mentions of us, our programs, publications and/or members. I could go on but don't want to bore anybody! The thing to remember about social media is that it takes time to build a following and/or a community so don't be discouraged if it's slow going.