The Bulk Actions menu allows you to select multiple customers and perform an action: subscribe, unsubscribe, or send a specific email to a group of contacts. Next to a contact, checkboxes can be selected for each contact on which you would like to perform an action. Once checked, the Actions menu appears.
The Actions menu will display 3 options.
You can perform an action on a few customers, an entire page of customers, or all of the customers within your current view: