Performance Mode tells Opteo which number matters most for an ad account:
Cost Per Conversion (CPA): keep the cost of each lead or sale down. Usually best for lead generation.
Return On Ad Spend (ROAS): get the most revenue from your spend. Usually best for ecommerce, and for lead generation if you track conversion values.
Opteo uses it across the ad account: the numbers you see first, the targets on the Targets page, and which Improvements you get. New ad accounts start on CPA.
It doesn't change your bidding or anything else in the ad platform. Ideally, match it to the bid strategy you use, but choose whichever reflects the ad account's real goal.
Change Performance Mode
Open the ad account and click Settings at the bottom of the left-hand menu.
In Performance Mode, choose Cost Per Conversion (CPA) or Return On Ad Spend (ROAS).
Click Update Performance Mode.
The Targets page shows a Target CPA or a Target ROAS for each campaign group, depending on the mode you choose. If you switch, check your targets afterwards. See Set up your Campaign Groups and Targets.