Short for click-through rate, the ratio of the number of times a user clicks on an online advertisement per number of viewers who view the Web site that has the advertisement on it. For example, if one out of 100 people who visit a specific Web site click on an advertisement and are taken to the advertiser's site, then the CTR of that advertisement is 1/100, or 1%.
E-Commerce Guide Provides advice, news, tutorials and resources specifically related to electronic commerce.
ClickZ Stats Home page for ClickZ Stats, a reference desk site for Web marketers that provides statistics and Web marketing information.
Refer-It.com The Refer-It database lists thousands of programs offered by e-commerce vendors that share revenue with Website owners.
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