Good points:
The good points of social networking are mainly that you can keep in touch with friends and family whether they live next door or on the other side of the world. Facebook is the worlds biggest social networking site and that was only created in 2004. That means older people who used to go to school ad have lost touch with certain friends that have moved away can now get in touch with them within a couple of clicks.
Also people can play games on social networking sites with each other or by themselves. This is great as people can play games while keeping touch and have fun.
Finally another good point is that you can post pictures and videos, meaning you can show friends and family things that could range from small things like a night out our your babys first words to big things like weddings or births.
Bad points:
Coupled with the good points are also some bad points such as, Posting photos, this can be fun as you can show family and friends major life events but once you post a video up it's not yours anymore as if one person posts it to some one else the video can snowball to other websites and before you know it lots of people will have seen it. This happens lots with videos of fights, when theres a fight in school or out on the streets people are likely to video this and post it to the internet and lots of people will be able to see it.