Just like some urls, Bitcoin and Altcoin addresses are unappealing to the eye and hard to remember to type each time. Also if your trying to send it over an application or sites where length matters they take up approximately 1/5 of that length. This site changes that and makes it easy to remember just like an email address or an easy url. Also like url shorteners this saves some characters for you ..
my BitCoin Wallet from BlockChain.Info ->