Network is about a seemingly prophetic news anchor who gets his own show because of the messages he is trying to send to the American people. The corporation he works for is really just milking his show for the money, while he stands up on stage and yells his ass off about the country's problems and how he's mad.
There are some sub plots within it, but Howard Beale's rantings are a focal point. He makes a good point most of the time, and as the movie goes on his message is distorted by orders from the higher ups in this corporation. This shows how the networks can and will twist the concept of a show because one man is saying too much. It also shows how TV is all about the ratings, and the money.
The movie starts with Howard saying on national television that he is going to kill himself on a broadcast. The day after, the ratings jumped tremendously and the network had an absurd amount of investors at the ready.
I took this whole thing to be showing of how only one man cared for Howards rantings, every other executive only wanted him around long enough to make them money. I would say if you haven't seen it, go do it. There are a few great moments of Howard's ranting where he points out how the TV is everything to some people and how they should turn it off, and yet they still get more viewers. If you take anything out from it, take either Howard's message, or the ideas of the corporation to make money off of howard. Both are more or less negative, but one gives a better outlook on how to fix it.