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.
(Photo : Justin Sullivan / Getty Images News) Social media giant Facebook is dubbed to be the most well-known social media network of all time; however, a recent study shows that it may be losing its popularity - to teenagers at least - over Twitter, Snapchat, Instagram and other messaging application.