Anonymous resident proxies are used to connect to the Internet securely and anonymously. In a normal connection, your IP address and your data are sent to the server of the resource you are visiting. When you connect through a private proxy, your real IP address is replaced by another one, thereby preserving your anonymity.
That is, the private proxy server acts as an intermediary between you and the destination web resource. Due to the fact that the proxy also uses real IPs issued by Internet service providers, blocking is eliminated.