You’re probably asking, “What the heck is WebRTC?” So let’s break it down: WebRTC, short for Web Real-time Communication, is an open source standard for native real-time communication in the browser. It allows you to add voice, video and data sharing right into your websites and applications.Think of it like this: You could create the next Skype or Hangouts-killer with WebRTC. But, it’s so much more than that. While it’s true that the standard hasn’t been finalized yet, and Microsoft and Apple have yet to get completely on board, I have five good reasons why you should start exploring WebRTC today.
via WebRTC introduction.