Gel polishing is a nail-hardening procedure that involves applying a strengthening gel to the surface of your natural nails. The gel creates a barrier that protects your nails, making them stronger and less likely to break or peel. Additionally, gel polishing also increases the durability of your nail polish and provides a shiny, glossy finish.Gel polishing is a nail-hardening procedure that involves applying a strengthening gel to the surface of your natural nails. The gel creates a barrier that protects your nails, making them stronger and less likely to break or peel. Additionally, gel polishing also increases the durability of your nail polish and provides a shiny, glossy finish.