Is advertising a waste of money?

Nowadays we can find lots of adds on TV, newspapers, streets,... But do companies waste their money on adds?

In my opinion, companies should use a part of their money to promote their products. Also there are companies wich put adds in very strange places like glasses or banches, but I think it's unnecesary.

I believe that there is too much publicity in the streets, and there should be specific places to put adds like newspapers, some webs, undergrounds...

I don't think advertising is a waste of money, but I think in some cases is really excessive or unnecesary.

Marian Guillén, 4t B.