What do you mean by Ad Rank?

Ad Rank is a value that comes into use while determining the ad position of any particular ad. It has a specific formula and is calculated using several parameters such as bid amount, auction-time ad quality, Ad Rank thresholds, the context of the person’s search, location, device, time of the search, the nature of search terms, the other ads as well as the search results that show on the page. The Ad Rank is recalculated every time the ad becomes eligible to get displayed and completes an auction. This means the ad position fluctuates and is never permanent. It depends upon the competition in the market, the context of the users who are searching and the quality of ad at that moment.