Contacts
Click "Contacts"
Select Your Contacts
Select the contact(s) that you wish to add a tag to.
Click the "Add Tag" button
Click the "Add Tag" button.
Click "Add Tags"
Click the "Add Tags" field.
Search for the tag you would like to add to the list by typing the tag's name here.
Select the tag(s) as it appears below the search.
Click the "Action*" field
Click the "Action*" field.
Type a description for the action (to be shown in the tracking report)
Click "Add"
Click "Add"