One of your line items has low performance and low delivery. How should you adjust your budget to optimize your campaign for better performance and delivery?

The correct answer is "Decrease bids and/or frequency caps." Decreasing bids and/or frequency caps is an effective way to optimize a campaign when a line item is experiencing low performance and low delivery. Lowering bids can help ensure that the campaign is more competitive in the auction, while adjusting frequency caps can ensure that ads are not shown too frequently to the same users, which can lead to ad fatigue and lower engagement. By optimizing these elements, the campaign can become more efficient, increasing its reach and improving delivery without unnecessarily raising costs. In contrast, increasing bids may not improve delivery if the ads are already not resonating well with the audience, and adding additional supply sources might not address the underlying issues with ad performance.