User-defined reports are custom reports where you, as the user, can select the dimensions and metrics you want to retrieve from Google Ads API.
When you select a user-defined report, you will see additional fields in the interface.
To build this type of report, you need to define the required API table, dimensions, and metrics yourself. Here is some guidance on how to do that.
1. Define a table
Select a table, which is required to be fetched from the API.
2. Define dimensions and metrics
Based on the selected table, you can pick up required dimensions and metrics: