Social media is changing the world.

It’s true. Stop for a while and listen: everywhere you go people are singing its praises. They’re talking about how Twitter is this fantastic customer service and news-sharing tool. That Facebook is an incredible platform for raising brand awareness and building community. Corporations around the world are using YouTube to share tutorials and video blogs. And Google+ has a really nice logo.

It all sounds amazing. So: where do you begin?

This cheat sheet from those nice folks at Flowtown and Column Five Media takes a look at the pros and cons of each of these channels, alongside Tumblr and even Digg (why not Reddit? Who honestly cares about Digg anymore?), giving you advice on how to get started and letting you know the size of audience that you’re reaching.

(Source: Flowtown.)