Google’s method for determining each ad’s position on a search engine results page. The advertiser with the highest ad rank will be placed in the top position followed by the ad with the second highest ad rank and so forth. Ad Rank is calculated based on the bid received, Quality Score and ad assets (formerly extensions), for each ad eligible to appear.
The rank of an ad in a given auction compared to other ads in that auction used to determine the ad’s position. Ad rank may be different in each auction