This is an Automate feature.
Pathfinder Pro users can create custom tags for contact data if they want further and more detailed targeting.
All custom tags will appear in the Contact page under Custom tags.
Creating Custom Tags
To create custom tags, first you need to create a custom category where your custom tags will be stored.
Once you've created the custom category, create your tag and fill out the required information, remembering to select the new custom category that you created to group your tag.
Once you've created the custom tags, you can set triggers if required.