the number of clicks that your ad receives divided by the number of times your ad is shown: clicks ÷ impressions = CTR. For example, if you had 5 clicks and 100 impressions, then your CTR would be 5%.
Impression
Impression How often your ad is shown. An impression is counted each time your ad is shown on a search result page or other site on the Google Network.
Mobile
is defined as where the ad can appear on “mobile” devices.
References
Mobile ad – Google Ads Help. (n.d.). Retrieved December 25, 2021, from https://support.google.com/google-ads/answer/2393039?hl=en&ref_topic=24937
Clickthrough rate (CTR): Definition – Google Ads Help. (n.d.). Retrieved December 25, 2021, from https://support.google.com/google-ads/answer/2615875?hl=en&ref_topic=24937
Impressions: Definition – Google Ads Help. (n.d.). Retrieved December 25, 2021, from https://support.google.com/google-ads/answer/6320?hl=en&ref_topic=24937