A cache is a component that stores data so future requests for that data can be served faster.
The data cached can be anything from a user’s browsing history to the results of a database query.
A cached page is simply a snapshot of a webpage as it appeared when a search engine last crawled it.
When you perform a search on a web browser, the search engine will check its cache to see if there is a copy of the page that it can serve up to you instead of having to fetch the page from the website itself.
This can be beneficial for both the user (in terms of loading time) and the search engine (in terms of resources).
However, it is important to note that a cached page is not always an up-to-date version of the page; it is simply a snapshot of how the page looked at one specific point in time. As such, it should not be relied upon for critical information. But for general browsing, a cached page can be a helpful way to get where you need to go faster.