A key performance indicator of how often people who see your ad or free product offer end up clicking on it. The click-through rate (CTR) can be used to measure how well your keywords and ads and free offers are performing.
The CTR is the number of clicks your ad receives divided by the number of views your ad receives: clicks ÷ views = CTR. For example, if you had 5 clicks and 100 impressions, then your CTR would be 5%.
Seen from a strict mathematical point of view, there is no clear answer. A high CTR is a good indication that users find your ads and listings helpful and relevant. The CTR also contributes to the expected CTR for your keyword, which is a component of Ad Rank. Keep in mind that a good CTR is relative to what you're advertising and what industry you're in.
One of the most important indicators of how successful a website or online store is in Google is the CTR. The value for this parameter is provided, for example, in the Google Search Console. Webmasters have the option of filtering by landing page or search query and examining the individual click through rates.