An app you've probably never heard of is the most important social network in China

You may have never heard of WeChat, but it's the most important app in China right now.

WeChat users can do just about anything, including play games, send money to people, make video calls, order food, read the news, book a doctor appointment, and more. It's basically China's version of Facebook.

"WeChat's reach and influence is unrivaled in China's online space," said research firm China Skinny. "It touches everything from consumers communicating with their nearest and dearest, to sharing their most special moments, to buying everything from cinema tickets to taxi rides."