We all know that Keyword Quality Score in Google Adwords determines how relevant your keywords are to the advertisement, and the secret of achieving maximum quality score has never been fully revealed. Recently I’ve been testing the impact to quality score by *Click Through Rate* Vs. *Ads relevancy to keywords*, the campaign is targeting local entertainment business. In this case, all the paid search keywords are local keywords, so click through rate was pretty high.

Before show you the results, you may want to watch this video officially released by Google. This is an introduction of Google Ad Auction system by Google Chief Economist Hal Varian. After this video, you will have a better idea why CTR is so important to quality scores.