Tags are labels that are applied to contact records to help you search for specific groups or people and segment them into various lists. Tags are often applied automatically as a person interacts with your company (i.e. filling out a web form, clicking on an automation link, etc.). You are also able to manually apply tags to a contact record based on your personal interactions with them.
To Manually Apply a Tag to a Contact Record:
Go to the contact record.
Click on the Tag tab in the top row of tabs. From here, you can manage the contact's tags.
Apply an existing tag: Select a tag from a drop-down and click on the Apply this Tag button.
Add a new tag: If you don't see the tag you need, click on the Create a new Tag button (if your user permissions allow).
Remove a tag: Click on the "x" to remove a tag from a contact record.