The performance metrics shown in the custom report cannot be customized.

The statement is false because custom reports in Amazon DSP are highly customizable. Users can select specific performance metrics they want to include, such as impressions, clicks, spend, conversions, and various e-commerce metrics like return on ad spend (ROAS) or average order value (AOV). This flexibility allows advertisers to tailor reports to their specific campaign goals and reporting needs, providing relevant insights without unnecessary data. If the reports were not customizable, advertisers would be limited to a fixed set of metrics, which might not align with their unique measurement objectives.