What is filter activity in the salesforce marketing cloud?

If you use interactions in Email Studio, you can use data filters to segment subscriber lists or data extensions. Select the data filter when you create a filter activity. Create filter activities on the Filter Activity screen on the Interactions tab. If you filter a subscriber list, select the list to segment with the filter. Provide a name for the group to contain the resulting segment. If you filter a data extension, select the data filter and provide a name for the data extension to contain the resulting segment. After you create a filter activity, start it. When you start the data filter activity or refresh the group, the system applies the logic you created in the data filter. The subscriber list and filter definition must exist before you can select them on the filter activity. Enter the name of the resultant group or data extension that the system creates when you save the filter activity. Filter activities provide more robust API support than subscriber groups. For more information please visit: https://getoncrm.com/salesforce-commerce-cloud/
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