To put it simple, Hotspot Shield is a free software that hides your IP address which means it ensures anonymity on the Internet. Not only will the user have freedom to browse all accessible websites but it will even enable him to access websites where he was previously banned from.
After installation, the user will always have the choice to turn his privacy protection "on" or "off", since being connected to Hotspot will use part of the internet bandwidth. A minimal loss compared to the speed drop that occurs when using the average proxy.
The Software will not just enable you to get access to blocked websites. Hiding the IP is also useful when connecting to the Internet via a cafe's WiFi because it will prevent potential hackers from stealing your data.