The number of ads Google took down last year for advertising policy violations nearly doubled from 2016, and cryptocurrency ads will soon join the list of forbidden ad types.

In 2017, Google says it took down:

  • 79 million ads for sending users to malware-laden sites.
  • 400,000 malware sites.
  • 66 million “trick-to-click” ads.
  • 48 million ads that prompted unwanted software installation. Search Engine Land