Why do you think certain people always brag about themselves on facebook?

[Angie K]

So I know a girl who got a job travelling doing sales for her company. She is always bragging on facebook how great her job is and saying stuff like "leaving to go to the airport now, will be skiing in Colorado for business......is this really my life? It couldn't get any better!" and other stuff constantly bragging about herself. To be honest the few times I met her I thought she was very fake and kind of a b%tch. She was always bragging about herself and backhandedly putting others down. She was also very untrustworthy and lied about not living with her current boyfriend when she was talking to another guy. However she seems very popular on facebook. Why do you think people do this kind of annoying stuff?