Overall Job Results
Overall Job Results is only available in the Premium edition.
Duplicate Check presents Overall Job Results, a brand new feature that allows you to manually process duplicate records from all duplicate check jobs you ran, in one overview component.
Duplicate Results Overview
After accessing the component via the "DC Job Overall Results" tab, you will see an overview of all duplicate records that are found across all existing jobs. You can enter a specific results list by clicking "view results".

The Overall Job Results Lightning Component will automatically fetch new results after refreshing the list.
Processing duplicate records
Processing duplicate records is similar to how you process duplicates via the Duplicate Check Job. Refreshing the results list will fetch new duplicate records that are found in any DC batch process, or duplicate records found via Unique Import, API Single Insert prevention, Web to Lead and more.