No, their (main) product is search. Advertising is how they monetize it. The Tribune Co.'s product is news, monetized through advertising. Conde Nast's product is magazines, monetized through advertising.
Just because advertising pays for the operation of a service, doesn't make the service not the product.
And yeah, I understand that Google also sells advertising as a separate item from their search engine, but that's not what parent anecdote was referring to.
Just because advertising pays for the operation of a service, doesn't make the service not the product.
And yeah, I understand that Google also sells advertising as a separate item from their search engine, but that's not what parent anecdote was referring to.