Facebook is a biggest and best social networking site in the world.Provides us a free platform to express our feelings, photos, our check in, our happiest moments of our life. This is website founded by Mark Zuker Berg of America.He started this sire so that peoples can connect to each other in a one open platform.
Now we talk about depth of information, then we can say that it provides a deep information of whole world because peoples are there from all over the world and they share all the content to each other. Usability is so easy as any one can make his account and can easily operate. Website load time is so fast. ans it is very good.