What is manipulation?

The manipulation of information in terms of advertising and politics is propoganda. Propoganda is one of the most effective tools for changing public opinion. But it is inevitable because our society is already overloaded with information. The media gets spun around so much these days, both left and right. Do you watch CNN or FOX? It's impossible to hide from it. And you can't just refuse to see advertisements anymore because they're everywhere. But sometimes people do a really bad job at it. I don't think advertising is entirely bad though, because who doesn't like to watch superbowl commercials?