The number of people who decide to follow a link.

The number of people who have clicked on a banner ad to link through to a jump page or website.

Also known as ad clicks and click rate. How often a viewer will respond to an ad by clicking on it and following the link.

The number of trackable URLs that have been clicked. This number may be greater than the number of opens or recipients if recipients click on a trackable URL multiple times, or if there are multiple trackable URLs in your message that recipients are clicking on.

The number of visitors who click on a specific advertising banner on a specific Web site or page.

The number of surfers who click on an ad and are sent to the sponsor's site. Legitimate click-throughs are often measured as Unique Hits. Some advertising programs pay a small amount ($0.01 - $0.20) per click-through, although the number of these programs is being reduced by widespread cheating. This may also be expressed as a ratio of Click-Throughs to total Impressions.