Why are brand names censored on Television?

Question

Often on television and in music videos i see brand names are blurred out or censored.

An example... the soulja boy video for crank dat..

and just in television if there is a bottle of a coke.. the coca cola will be blurred out..

I have a rough idea why but would like a full explanation please.

thank you.

Answer 1

In the UK it is illegal for broadcasters to advertise products on tv unless they are in commercials or sponser slots (the bits at the start and end of a show).

Answer 2

because it's free advertising.