This is the amount of people that clicked on paid ads in Google results 5 years ago.
This is the amount of people who clicked on paid ads in Google results for 2018.
Projected 1st page of Google results by 2030.
Google has something called a Quality Score. This means they judge your ad against the page it is being directed to. If you have no content and a poor CTR (Click Through Rate), your ad will be more expensive or not show at all.