Nails serve several important purposes.

• They help humans function. Nails are basically flat versions of claws that help humans dig, climb, scratch, grab, and more.
• They guard against injuries. They serve as protective plates that help prevent the fingers and toes from getting cut or scraped during daily activities.
• They enhance the sensation. The fingers and toes contain nerve endings that allow the body to process the volumes of information that it receives every time something is touched—and the nail acts as a counter force, providing even more sensory input after a person touches something. ~verywell health