Click through rate
Click though rate has decreased significantly over the past years. In 1994, an advertisement was placed by AT&T on the website HotWired. This is considered as the world's first digital advertisement. This ad had a CTR of 44%. This means out of 100 people who saw the ad, 44 clicked on the ad and landed on the AT&T website.  In 2020 Google ads has a CTR of 3.17% meaning out of 100 people seeing the ad, only about 3 people will click and go the advertiser's website.