Specificly what is Facebook, and Twitter?

[Joseph]

Facebook, Twitter, and Myspace are all social networking sites. I'm not really sure about twitter, but I think that it is basically the same thing as the other two. Basically, they are all things where you can share information. It's social networking, so it is where you can send info and things to your friends. The reason why some people say it is unsafe is because when meeting new people online, you don't really know if they are who they seem to be. But an easy solution when trying to make friends on any one of these sites is by knowing the actual person, confirming in person if they have an account, and then asking your real friend if they will accept, etc. I am fairly sure that they are all free; facebook is definitely free.