Caching is a technique used in computing to store frequently accessed data in a temporary storage area, known as a cache. This allows for quicker access to the data, reducing the time it takes to retrieve it from the original source, such as a database or a web server. By keeping copies of popular data close at hand, systems can improve performance and efficiency. There are different types of caching, including browser caching, memory caching, and disk caching. Each type serves a specific purpose, such as speeding up web page loading times or enhancing application performance. Overall, caching helps optimize resource use and enhances user experience.