Search engine cache is like a snapshot of a web page. When you type a website address (like www.example.com) into a search engine, like Google, it pulls up a copied version of the page. This copied version is called a cached page. It helps you see what the page looked like when Google last visited it. That way, if the web page has changed since that time, you won't see the new content. It's like taking a picture of the page to store in your photo album, so you can look at the same picture over and over again.