A cache buster is a clever and effective technique used to prevent web browsers from storing or retrieving outdated or previously viewed content from a website’s cache. This is achieved by adding a unique identifier to the end of a URL, forcing the browser to retrieve the most recent version of the content from the server. This not only ensures that users are always seeing the most up-to-date information, but also helps to improve website performance and prevent potential security risks. In other words, a cache buster is like a secret code that keeps your website fresh and secure.