Client-Side Programming refers to the code that runs on a user's device, typically within a web browser. This type of programming is responsible for creating interactive and dynamic web pages, allowing users to engage with content without needing to communicate with a server for every action. Common languages used in client-side programming include HTML, CSS, and JavaScript. The main advantage of client-side programming is improved performance and responsiveness, as actions can be processed locally. This reduces server load and enhances user experience by enabling features like animations, form validation, and real-time updates without constant server requests.