useRef is a hook that allows you to create a mutable reference that persists across renders. It is useful for accessing a DOM element or storing values that do not cause a re-render when they change.

Example of useRef:

          {`import React, { useState, useRef } from "react";
          
          function FocusInput() {
            const inputRef = useRef(null);
            
            const handleClick = () => {
              inputRef.current.focus();
            };
            
            return (
              <div>
                <input ref={inputRef} type="text" />
                <button onClick={handleClick}>Focus Input</button>
              </div>
            );
          }
          
          export default FocusInput;`}