This application/platform was designed for getting snapshots way back in time, to see how some websites did look at those moments.
For example: take as search the cnn.com and see how did look over time. Very useful for webmasters looking to buy domains and websites, in order to find the history and establish the worth of them.
There are two applications/platforms at this moment which are very powerful. Be advised that both of them are very slow in function!