Maintain bids and frequency caps to preserve strong results and consistent reach when a line item shows high performance and high delivery in Amazon Ads.

• Consider pausing the line item
• Remove additional supply
• Maintain bids and frequency caps

The correct answer is: Maintain bids and frequency caps

Explanation: When a line item delivers both high performance and high delivery, it means your campaign setup is working effectively—your ads are achieving strong results and are reaching a large audience. In this situation, the best optimization strategy is to maintain your current bids and frequency caps. This avoids unnecessary changes that could disrupt a successful campaign, helping to ensure that performance remains stable. Regularly monitoring results is recommended, but no immediate adjustments are necessary.

Reference: https://advertising.amazon.com/help/GJHF6GB7WZUMPYJ6