If an advertiser's primary goal is to achieve the lowest possible Cost Per Result while ensuring a minimum number of conversions, which specific bidding strategy should be employed, and what parameter needs to be set?

The specific bidding strategy that should be employed is Target Cost Per Acquisition, often referred to as Target CPA. Target CPA is an automated bidding strategy where an advertiser tells the advertising platform the average cost they are willing to pay for a conversion. A conversion is a desired action a user takes, such as a purchase, a form submission, or a sign-up. This strategy directly addresses the goal of achieving the lowest possible Cost Per Result because the advertising platform's algorithms automatically adjust bids in real-time for each individual auction to try and achieve an average Cost Per Result that is at or below the specified target. While prioritizing cost efficiency, the Target CPA strategy also aims to acquire as many conversions as possible within the set average cost constraint, thereby addressing the requirement for a minimum number of conversions. The specific parameter that needs to be set is the Target CPA value itself. This numerical value is the maximum average cost the advertiser is willing to pay for each conversion. Setting this parameter appropriately is crucial; if the Target CPA is set too low, the system may struggle to find enough bidding opportunities that meet this strict cost goal, which could inadvertently reduce the total number of conversions. Conversely, if the Target CPA is set too high, the system might achieve more conversions but at a higher average Cost Per Result than desired. Therefore, the advertiser must carefully determine and set a Target CPA value that effectively balances the desire for the lowest possible cost per conversion with the necessity of achieving a sufficient volume of conversions.