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To put it simply, web caching stores data in a server for future reusing.
How exactly does it work?
When you open a site, the web caching gathers all the website data, turns it into an HTML file and opens it on your browser.
The next time you open the same site, a cache will load a copy. This helps the server to work faster and not overload.
Of course, if the website is updated, the process will start from the beginning.
Two things to keep in mind – first, not every website uses cache. Secondly, a cache can expire or be removed manually.
If you are using Google Chrome and want to clear cache, click the three-dot menu at the top right of your page and select History (or press Ctrl + H). Then, click Clear Browsing Data. After that, tick the option you want and press Clear data.