Google is not just the most popular search engine in the world, it is also the most powerful. It saves thousands of pages snapshots every day and puts them in the cached pages database. Google cache is available all the time even when the web page is down for some reason. If you need to open such page at the moment and can’t wait till it comes back to life, the easiest way is to open the cached version. Google cache is some kind of online book storage, where you can open, visit and browse cached websites event when they temporary down. Google renews its cache 2 or 3 times a week, sometimes less often, frequency of updates depends on how often website developers update their website.
Do you know that the cached version of the site could be even faster than the real site? The cache is stored by powerful google web servers which makes webpage cache more accessible than it’s the real version on slow web servers.
What if you need to open the cached version on mobile device? It's not very comfortable to copy-paste using sensor screens. But it will be much easier with our google cache browser which we are going to launch soon. You will be able to browse all sites web cache without entering URL every time you want to follow other pages.