AMC helps you assess cross-product campaign performance so you can optimize advertising strategies and maximize impact across channels.

• To easily measure multiple accounts and entities
• To assess pre-aggregated metrics for your Amazon retail goals
• To assess the performance of your cross-product campaigns

The correct answer is: To assess the performance of your cross-product campaigns

Explanation: You would use Amazon Marketing Cloud (AMC) to help optimize your campaign strategy because it provides in-depth analysis and assessment of your cross-product campaigns. AMC enables you to combine and analyze data from various Amazon ad products (such as Sponsored Ads, DSP, Streaming TV, and advertiser first-party data) to evaluate overall campaign impact, measure conversions and track customer journeys. With AMC’s unified and customizable reporting, you can identify which media mix and ad channels deliver the best results, allowing for smarter budget allocation and campaign optimization.

Reference: https://advertising.amazon.com/solutions/products/amazon-marketing-cloud