Pinterest Performance+ campaigns utilize a sophisticated, AI-driven budgeting system that prioritizes flexibility and performance over rigid daily caps. Average Daily Budgets: Unlike standard daily budgets that often act as a "hard ceiling," Performance+ daily budgets are designed to be "flexible." The system can flex spend up or down by up to 25% per day based on real-time opportunities. It aims to average out to your target budget over a rolling 7-day period, ensuring you spend more when conversion intent is high and less when it's low. Lifetime Budgets: This option allows you to set a total spend for the entire campaign duration. The algorithm then identifies "missed opportunities" across the calendar, automatically allocating more budget to high-traffic days (like weekends or holidays) to ensure the full amount is spent effectively by the end date. Performance Optimization: Because there are no "strict" limits that cut off your ads the second a daily cap is hit, your ads can continue to run as long as the AI identifies a high-value opportunity. This "unconstrained" approach helps maintain a steady presence in the auction and leads to lower overall Costs Per Action (CPA). Reduced Manual Toil: This automated distribution removes the need for advertisers to manually "rollover" unspent funds or adjust budgets daily to account for market fluctuations.