A URL shortener is a tool that converts long web addresses into shorter, more manageable links. This is particularly useful for sharing links on social media platforms or in text messages, where character limits may apply. By using a URL shortener, users can create concise links that redirect to the original, longer URL. These services often provide additional features, such as tracking the number of clicks on the shortened link or customizing the link for branding purposes. Popular URL shorteners include Bitly, TinyURL, and Rebrandly, each offering unique functionalities to enhance link sharing and management.