Respins are repeated reel spins. They give you additional chances of success in the game.
Respins appear in various games or bonus features. They are part of the base game and are usually re-triggered by landing additional scatter symbols.
In bonus features , a respin counter is available for this purpose, which usually starts with three respins. If no success is achieved during the respins, the counter is reduced down to zero. However, as soon as a success is achieved, the counter is refilled to three respins.