Encyclopedia of Machine Learning

2010 Edition
| Editors: Claude Sammut, Geoffrey I. Webb

Click-Through Rate (CTR)

Reference work entry
DOI: https://doi.org/10.1007/978-0-387-30164-8_118

CTR measures the success of a ranking of search results, or advertisement placing. Given the number of impressions, the number of times a web result or ad has been displayed, and the number of clicks, the number of users who clicked on the result/advertisement, CTR is the number of clicks divided by the number of impressions.

Copyright information

© Springer Science+Business Media, LLC 2011