Web caching is a technique used to store copies of frequently accessed web content, such as images, videos, and web pages, on a temporary storage system. This helps reduce the time it takes to load a website, as the cached content can be retrieved quickly without needing to fetch it from the original server each time. When a user visits a website, their browser may save a cached version of the page. If they return later, the browser can display the cached version, improving load times and reducing bandwidth usage. This process benefits both users and web servers by enhancing performance and efficiency.