Google Ads follow the Media Rating Council’s standards for viewability. What’s required for an ad to be counted as a viewable impression?

• An ad must be more than 75% on-screen for more than five seconds.
• An ad must be more than 50% on screen for more than five seconds.
• An ad must be more than 50% on screen for more than two seconds.
• An ad must be more than 75% on screen for more than two seconds.

The correct answer is:

• An ad must be more than 50% on screen for more than two seconds.