the ability used on the Internet and the service globally provided by different companies. The service is used in cases when it is necessary to have additional short URL to access a Web page.URL shortening helps to create shorter addresses. Twitter or IM programs even a 60-character URL may be too long.Currently, web developers often pass URL parameters to represent data hierarchies, command, the load path or session information. This is often reflected in the URL, making it difficult to understand and remember. The URL in which more than 100 characters, if you frequently copy can carelessness to be copied not completely, which makes the link broken. While the short URL is easy to copy in letters, e-mail or message on forums.Vanity URLS can be useful when reading aloud. Also, in recent years, a host of services that provide a short link composed entirely of Russian letters.Some services offer detailed information on appeals to the shortened link, while monitoring and collecting data on the countries-sources of traffic, HTTP referrers, browsers and operating systems visitors.URL shortening is a special kind of redirects that can be used to prank, phishing and hiding the source. For example, referrals to pornographic or malicious sites. In order to avoid falling into dangerous and unwanted resources exist online services for "deciphering" short link that allows you to see the original URL. Some of the sites providing the service for link shortening, began to filter all shorten links through services like Google Safe Browsing.