HTTP Caching is a technique used to store copies of files or data from a web server on a user's device or an intermediary server. This allows for faster access to frequently requested resources, reducing the need to fetch the same data repeatedly from the original server. By using cached data, websites can load more quickly, improving the overall user experience. When a user visits a website, the browser checks if it has a cached version of the requested resource. If available and still valid, the browser serves the cached version instead of making a new request to the server. This process helps save bandwidth and reduces server load.