No. Google owns your phone and your browser, your email, your video feed and often your office productivity tools too. All human eyeballs go through Google's a

No. Google owns your phone and your browser, your email, your video feed and often your office productivity tools too. All human eyeballs go through Google's advertising network first. (Unless you're an Apple-only person.) So for advertisers it makes no sense to budget anything but Google first and foremost. Maybe they'll add some Bing-Yahoo if they have spare money laying around and want to catch the remaining couple percent of the audience. P.S. Search is only a small part of Google's advertising network, and not the most important one nowadays.