https://support.google.com/adwords/answer/2615875?hl=en&ref_topic=24937


A ratio showing how often people who see your ad end up clicking it. CTR can be used to gauge how well your keywords and ads are performing.

  • CTR is the number of clicks that your ad receives divided by the number of times your ad is shown (called impressions). For example, if you have five clicks and 1000 impressions, then your CTR is 0.5%.
    CTR = Clicks on your ads ÷ Impressions (ad views)
  • Each of your ads and keywords have their own CTRs that you can see listed in your account. 
  • Industry average CTR is 1%