What is CTR?
CTR stands for Click-Through-Rate. This is the number of people who actually clicked on a specific ad versus the total number of people who saw the ad displayed.
This metric is used quite frequently in paid ad campaigns but is also valuable to note within your website. If you have a promotion running and show a graphic on your homepage advertising it, the CTR can help you determine if the graphic was desirable enough for people to want more information.