Does TV influence people?

Some people believe that the television doesn`t influence but it isn´t true, because the advertisements manipulate the thinking of the person.
But why do advertisement companies behave like that with us?

First, the advertisements try to catch people's attention so they buy the products they want to sell, sometimes fooling us because they manipulate the product and make it better than it really is.

Moreover, there is a lot of rivarly between the advertisement companies because it is very important for them to be the bests and have more clients.

But also, we can have many advantages because of the rivarly. How? The manufacturers bring the prices down to have more customers, so we can buy cheaper things.