The Basics of Browser Cache
A web browser, such as Google Chrome, Mozilla Firefox, or Internet Explorer, is a software application that we use to fetch and see information living on the internet. In other words, a browser looks, finds, and presents to us websites and/or other pieces of information we look for via URLs.
A browser’s cache is its appliance or instrument through which it saves data, such as images and HTML, needed to see a website. The intent behind saving such data is to help with bandwidth.
So, the next time you go back to see a page, it takes less time to load as a cached version of the page has already been saved. In other words, because you have a cached version of a page, your browser will not need to send a new request to see that page.