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.
Let there be light. For the first time ever, the world has a clear picture of just how many people are using services provided by the three social media giants: Facebook, LinkedIn and Twitter. Going by the metric of monthly active users, Facebook leads the pack, with 1.19 billion.