Measures how much users click on links relative to how much the ad is displayed. It refers to the number of click throughs per hundred ad impressions, expressed as a percentage.
The number of clicks on a link compared to the number of people who see the link. A measure to assess the effectiveness of online marketing like banner advertising, emails or search advertising. Example: A newsletter is viewed by 100 people, and 8 of them click on links contained in the newsletter. This equates to a click-through-rate of 8%.
The amount of times an online advertisement or link is clicked on divided by the number of times it is displayed (impression).