Click through rate is important because it gives you a good idea on how well your copy is working. If you have written a good ad, post, or email that really makes the prospect want to learn more then you will have a high click through rate. CTR stands for click through rate, and in the simplest form, it is the number of clicks an ad receives divided by the number of times the ad, ad unit, or page is viewed. In other words, it is the percentage of how many clicks an ad received