Which table should you use in a query meant to help you choose new Amazon audiences that may benefit your Amazon DSP campaign performance?

The dspimpressionsbyusersegments table is designed to show impressions broken down by user segments, which is crucial for identifying new Amazon audiences. This table provides insights into which user segments are being exposed to your ads, allowing you to analyze performance across different audience types and discover untapped segments that could improve your campaign. The amazonaudiences table typically lists available Amazon audiences but doesn't provide performance metrics tied to impressions. The dspimpressionsbymatchedsegments table focuses on impressions matched to specific segments, which is useful for analyzing existing audience performance but less effective for discovering new audiences for expansion.