Another alternative would be "advert on TV".
Advertising is a general term referring to all the publicity and marketing for a certain product or products.
An advert, advertisement or commercial is a single piece of advertising. A commercial is only on TV.
The government will try to ban tobacco advertising.
I think that there is too much advertising in our society.
The advertising agency is recruiting a new designer.
I loved that funny advert on TV last night!
Do you think that adverts on the sides of buses really work?
The hotel chain paid to put advertisements in all the daily newspapers.