1. Start by navigating to the Contacts section.
2. Next, choose the contacts you want to tag.
3. Then, initiate tagging by clicking the tag button.
4. Now, type in a descriptive name for the tag.
5. Afterwards, select the appropriate tag from the list.
6. Confirm by clicking on 'Add Tags' to finalize.
7. Finally, click 'Check Progress' to review the tagging status.