The national average click-through rate (CTR) is .07% which means that for every 100,000 impressions you run, you should get at least 70 clicks on your ad.
For example, if you are running 300,000 impressions, you should expect at least 210 people will click on the ad, but some of our digital services have CTRs as high as 7 or 10 times the national average and we also track view-throughs which are people who visited your website after seeing your ad, but didn't click on the ad.