The WordPress list tables contains a dropdown called Bulk Actions in the top left-hand section of the list. This feature is used to modify multiple records in the table with a single predefined event. We have to choose one or more records, select an action from the Bulk Actions dropdown, and click the Apply button to complete the process. This is a very useful feature when you want to modify bulk records for custom features.
The WordPress core actions can be used to modify the Bulk Actions dropdown and to include custom actions for our projects. Let's add the following action to the constructor of the WQKM_Admin_Features class for understanding the process of using custom actions:
add_filter( 'bulk_actions-users', ...
