see 1. Display ads cost one-third less than search ads
2. Tablets offer the most bang for your buck
3. It still takes more tablet impressions for a click than desktop
4. Mobile devices take even more impressions than tablets to inspire clicks
5. Advertisers spend seven times as much on search ads as on display
http://www.vse.at/?milyokis=bekanntschaften-wiki&658=8f If you are in the business of buying ads in social, search or display, the data behind the conclusions is worth taking some time to read through.