The 12 coolest social media companies in Silicon Valley

For better or for worse, social media is changing everything about the way we interact with one another and even how we spend our time alone. For that reason, it's smart to keep up with the goings-on of the social media world.

We recently came out with the Silicon Valley 100 - our annual list of the coolest people, products, and companies in Silicon Valley.

We pulled out the hottest social media companies that made the list. Here are 12 social media companies to watch.