Jim has created a Google Search ad with a bid of $5. Two other advertisers in an auction have bids of $2.50 and $2. How much would Jim pay for the first spot in the auction?

The selection is correct because Google Ads operates on a generalized second-price auction model, where the winner does not pay their full bid amount but rather the minimum amount necessary to maintain their position above the next closest competitor. In this system, the "actual CPC" is typically calculated as the amount required to beat the Ad Rank of the advertiser directly below you, which is mathematically represented as the next highest bid plus the smallest billable increment—typically one cent ($0.01) in most currencies. Therefore, if Jim is the highest bidder at $5.00 and the nearest competitor has bid $2.50, Jim secures the top spot and is charged only $2.51, ensuring the auction remains fair and prevents advertisers from overpaying while still rewarding the highest bid and quality combination.