Use actions with multiple leads at once is a great way to quickly (and easily) organize your data. You can:
Tag
Assign owner or collaborators
Delete all
Send SMS messages
Or export to CSV
The steps are very simple:
Open Teamgate Leads
Select Leads you want to tag in bulk, as an example, using checkboxes. You can use "Select all" option by clicking the first one checkbox.
Select an action from the additional menu at the top of the Leads list.
Select tag from the tags list (or different options).
Save.