URL shortening is a technique that converts a long web address into a much shorter one. This is useful for sharing links on social media, in emails, or in text messages, where space is limited. The shortened URL redirects users to the original, longer link when clicked. Services like Bitly and TinyURL provide this functionality, allowing users to create custom short links. These services often offer tracking features, enabling users to see how many times their link has been clicked. URL shortening helps improve the aesthetics of links and makes them easier to share.