How does Pinterest Performance+ bidding optimize for performance on Pinterest?

Pinterest Performance+ bidding (which includes oCPM or Optimized Cost Per Mille) is the primary engine for driving lower-funnel results. It works by using AI to analyze real-time signals—such as a user's search history, visual interests, and past shopping behavior—to determine the likelihood of a conversion. Optimization Logic: Even though you are technically paying for impressions (CPM), the system doesn't just show the ad to anyone. It specifically targets users most likely to complete a conversion (like a checkout or sign-up). Catalog Sales Integration: In Catalog Sales campaigns, Performance+ bidding takes this a step further by matching specific products from your feed to the users most interested in them, effectively "bidding" more aggressively for high-intent shoppers to secure the sale at the most efficient price. Efficiency: By optimizing for the "likelihood of action," the system can often reduce your overall Cost Per Acquisition (CPA) by avoiding spend on users who are unlikely to convert.