What is the difference between clicks and impressions? What is CTR?
A click is an actual engagement a person makes with the mouse, an actual click on a banner ad or text link.
An impression is how many time an ad (banner) was delivered. Usually equal to or close to amount of page views. More abou that is here: http://en.wikipedia.org/wiki/Impression_%28online_media%29
CTR is short for Clickthrough rate - basically how many times a click is done to the amount of impressions. More about that is here: http://en.wikipedia.org/wiki/Clickthrough_rate
Hopefully that answers your questions, and if you don't mind us asking - are you interested in becoming a seller (publisher) or buyer? Let us know how we can help!
This question has received the maximum number of answers.