1 Canker sores are small, painful ulcers on the inside of the mouth, tongue, lips, or throat.  Symptoms of canker sores include small, painful, crater-like ulcers.
Facebook is the biggest social network on the web, both in terms of name recognition and total number of users. With nearly 1.8 billion active users, Facebook is a great medium for connecting people from all over the world with your business. And the site is not only the biggest network, but it's also arguably the most versatile one.
A Guide to Facebook Image Sizes (and Other Important Stuff) Facebook is a wily beast, hard to pin down but vast in its appeal. According to the Pew Research Center, a full 71% of online adults use this social media behemoth.