The Contacts page lets you select any number of contacts and apply tag or list changes to all of them in one step.
What you can change in bulk
Add Tags - add one or more tags to every selected contact. You can also create a new tag by typing a name that does not exist yet.
Remove Tags - remove one or more tags from every selected contact.
Add Contacts To Saved Lists - add every selected contact to one or more existing saved lists.
Removing contacts from a saved list is not available through bulk edit.
How to bulk-edit contacts
Go to the Contacts page.
Click Edit Multiple in the toolbar above the table.
Check the box next to each contact you want to edit. To select all contacts matching your current filters, use the select-all checkbox at the top of the column.
Click Edit [number] (the button shows how many contacts are selected).
A panel opens on the right side of the screen labeled Edit Multiple Contacts.
Fill in any combination of the three fields:
Add Tags - type or pick tags to add.
Remove Tags - type or pick tags to remove.
Add Contacts To Saved Lists - type or pick lists to add the contacts to.
Click Make Changes.
The button stays disabled until you have made at least one change in the panel.
Canceling
Click Cancel in the toolbar or in the panel to exit bulk-edit mode without saving. Your selection is cleared automatically.