Which of the following is a best practice for budget optimization to help maximize delivery and performance?

Using a line item's projected spend to identify under-delivering tactics allows you to proactively adjust targeting or bids to ensure full budget utilization and maximize performance. This is a core principle of budget optimization. Mixing ASAP pacing with other pacing profiles in the same campaign can lead to uneven delivery and make optimization more complex, as ASAP prioritizes rapid spend over consistent delivery. Opting out of short flight campaigns from budget optimization is generally not a best practice, as even short campaigns benefit from efficient budget allocation to achieve goals within their limited timeframe.