React's useRef Hook stores mutable values without triggering re-renders

The useRef hook in React stores persistent values that don't trigger component re-renders when changed. It returns an object with a mutable 'current' property that can hold any value. Developers commonly use useRef to directly access DOM elements, such as focusing input fields. Unlike useState, updating useRef's value doesn't automatically cause UI updates. The hook is also useful for storing previous values or mutable references that shouldn't affect rendering.