Proxy sites are used, for example, to transfer information from a blocked domain to an open domain on a website.
This will allow proxy sites to provide the same content at the new address, and will do nothing less than teach the new address to users.
Proxy sites may offer things like movies, music, or other content of general interest to people. When these people get used to a particular site, it is difficult for them to switch to a new one.
Using proxy sites is a very good solution when a website has to change its original domain name, or if, for example, it has been decided by a state to completely disable it.
Proxy sites are also popular because most if not all are free. They work by covering up your IP address, which gives you access to sites you otherwise might have access to. Proxies work to get you to a website you might not otherwise have access to.
Proxy sites and security
However, it is worth noting that always using proxy sites is not a matter of course. Many security threats as well as legal issues may be hidden in these. However, you can protect yourself reasonably well if you take care of your privacy in addition to basic security by using a VPN connection.
With VPN, you can use proxy servers without the authorities of your country, for example, knowing whether or not you are using those proxy servers. Many proxy sites may also be blocked by ISPs, so you must use a VPN connection to bypass these blockages.