Which of the following metrics shows the number of times your ads were displayed?

  • Clicks
  • CTR
  • Pageviews
  • Visits
  • Impressions

The Correct Answer is:

  • Impressions

 Explanation: How often your ad is shown. An impression is counted each time your ad is shown on a search result page or other sites on the Google Network.

You can read more here: https://support.google.com/adwords/answer/6320?hl=en