The Measurement Simulation Library helps you to understand the impact of your Privacy Sandbox integration by presenting historical data as if it were collected by the Attribution Reporting API. This lets you to compare your historical conversion numbers with Measurement Simulation Library results to see how reporting accuracy might change. You can also use the Measurement Simulation Library to experiment with different aggregation key structures and batching strategies, and train your optimization models on Measurement Simulation Library reports to compare projected performance with models based on current data.
Read the Measurement Simulation Library design proposal to learn more.