If you're a regular reader of Mashable, you're likely a firm believer in the power of social media. We've highlighted how the social web can improve your career, aid charitable causes, transform businesses and even change the world. In short, we're convinced.

But what do you say to someone who doesn't get it? Maybe you have a boss who thinks social branding a waste of time or chatted with a friend who doesn't believe that Twitter can help land her a great job. Maybe they have no clue what social media even is.

Last year, marketing director Marta Kagan helped solve this problem with her presentation What the F**k is Social Media?. It was quickly a social media hit for its wit and its very convincing case for the raw power of social media.

With the tremendous growth of Twitter, Facebook, and blogging in the last year though, Ms. Kagan thought it was time for a sequel. We couldn't agree more. The stats she cites and the savvy she employs in What the F**k is Social Media: One Year Later makes it a worthy successor.

The next time you need to explain the benefits of social media to someone, just send them this post and make sure they flip through the entire presentation. Here it is: