social network

Why are people so worried about having many followers on social networking sites? That's something which impacted me quite a lot. I suppose people are concerned about having a high number of followers because it's a business.
From my point of view, it's very tedious to look at so many story from your followers who try to show that they are living in a "wonderland", without any kind of problems or simply, they show you what they have just eaten.
Social networking is very interesting, especially as have the chance to study the human social behaviour.