How did Web 2.0 develop in today's society?

Web 2.0 is now a big part of our society. Most people uses this to share information and get information. If you want to share information, you could use blogs. A big website that is used a lot to communicate is obviously, Facebook. Usually, this is what kids for example do in their free time but there is more to having this kind of websites.

 It makes you feel connected to something, (for example) if you are leaving your parents because you found a job in a different country, you could use Social Networking website to keep connecting to them.  Nowadays, there are also apps in phones for this. Basically, Web 2.0 is helpful because it is the easiest way to get information (instead of going in the library) and to be socialized.