A lot of people are starting to use social networking for business reasons and this is proving to be one of the most valuable uses. Social networking is just that a way to network, everybody knows that networking is critical for things like finding a job. This is why we are starting to see sites appear that are designed specifically for networking for professional reasons. Again the advantage is that you can network with a lot more people than you would be able to if you had to do it in person.
Perhaps the best reason for social networking is that it is fun. People can and do spend hours a day on social networking sites interacting with their friends. It is a good way to stay in touch and to find out what is going on their lives. In addition there are all kinds of games and similar things that you can do on these sites. There does not have to be a useful purpose for using social media, you can use it simply because you enjoy using it. Ultimately this is why most people do it and there is nothing wrong with that.