What is Click Through Rate (CTR)?
Click through rate is the number of times someone clicks on your banner vs. the number of times the banner ad is displayed by the publisher. This number is set as a percentage ranging from 0 to 100. If your banner is displayed 1000 times and it is clicked on 10 times, your click through rate (CTR) would be 1%. There are many tools online used for calculating click through rates. When looking to purchase ad space, ask the publisher what their average click through rates are. You can then determine approximately how much traffic you might receive and whether the cost of the campaign is worthwhile.