If you had a blackbox, where for every $1 you put inserted, you got out $1.25, how much money would you try to put in? A tuned online advertising campaign does

If you had a blackbox, where for every $1 you put inserted, you got out $1.25, how much money would you try to put in? A tuned online advertising campaign does exactly that for advertisers. Google and Facebook harvest even more granular data so you can adjust more finely tuned knobs to improve advertising performance. This is the whole reason why a lot of advertising dollars are moving away from broadcast and print media to online media.