The useState hook is used in functional components to add state to React components. It allows you to declare a state variable and provides a function to update that state.

Key Features:

• State Initialization: useState accepts the initial state value as an argument.
• State Variable & Setter Function: It returns an array with two elements: the current state value and a function to update it.
• Re-renders: When the state changes, React triggers a re-render of the component with the new state value.

The useState hook simplifies state management in functional components and enables dynamic, interactive UIs.