Apply metadata to the existing assets template

1. On the Dashboard, select Create flow.
2. Enter a name for the flow and select Purging from the Template dropdown list.
3. Select Create.
4. Select the When a scheduled event occurs node.
5. Select Hourly or Weekly from the Frequency dropdown list. 
   Hourly - enter the hourly interval in the Hours field. If you set, for example, a 2-hour interval, the task will run at 00:00, 02:00, 04:00, and so on, every day.
   Weekly - select the day (or days) from the Days dropdown list and enter the time in the Time field.
6. Select the Get assets node.
7. Select the pool (from which to retrieve the assets) from the dropdown list.
8. Enter your search input. For more information, see Using dynamic tags in value fields for search filters. 
9. Select Save.
10. Select the Apply metadata macros node to apply the metadata values. If you haven't created a metadata macro, select Create to do so. For more information, see Apply metadata macros.