This is the window that displays the Electric Rule Check (ERC) results list.
You can toggle the display of errors and warnings, and by double-clicking on the results list, the screen will move to the location where the problem exists allowing you to quickly resolve electrical problems on the schematic.

By default, it is located at the bottom of the screen.

For more details about Run ERC, refer to Schematic Verification (ERC/DRC).

ERC Results Window Icon

If the Response Status changes from "Not yet" to "Approved", the Approver and Approval Date will automatically be registered in the Approver column.