Twitter is a good social media site if you want to see what people are doing , especially famous people. With twitter you don`t have direct contact with people so it`s safer then face book. Also it is not as easy to accidentally give out personal information.A pointer for twitter is to make sure to sometimes to retweet so you can get a say in a conversation.
Facebook is another social media site which is a little different then twitter. This is because in Facebook you directly talk to people and have friends. A pointer for face book is to turn your notifications off on your email so you don`t get spammed from face book.