It allows you to assign various system actions and operations to the unused and unassigned keys on your keyboard so you can repurpose them for other useful actions. Key Remapping is a way of replacing the default value of a key with that of another key.
Repurpose Mac Function Key to Run Services Repurpose Mac Function Key to Launch Apps Repurpose Mac Function Key to Move Focus Between Apps Repurpose Mac Function Key to Show Turn Do Not Disturb On/Off
Repurpose Mac Function Key to Show Notification Center Repurpose Mac Function Key to Take Screenshots