From the many features that are available with Google, Google Cache is one important feature that helps you to see the cached pages of any website. If a website is not accessible in your location or is down currently, you can use Google Cache to view the website or a particular web page. Google basically takes a snapshot of each website or web page and stores in it’s server. Instead of using a proxy server or VPN to access a website that is not available you can use Google Cache. But users have to note that Google Cache web pages gives you a limited functionality. To view a Google Cache page, you need to add the ‘cache:’ string before the website URL.
Basically, when you enter something like “cache:www.Gmail.com” in www.Google.com you will see- “This is Google’s cache of http://mail.google.com/. It is a snapshot of the page as it appeared on Jun 12, 2013 14:22:44 GMT. The current page could have changed in the meantime. Tip: To quickly find your search term on this page, press Ctrl+F or ⌘-F (Mac) and use the find bar.” Also you can use the Instant Previews feature of Google to take a look at the cached pages from Google server.