A proxy server is used as a go-between for data from browsers to websites on the internet. There are many advantages of using a proxy server, both for the user and the organization offering internet access to the user. In general, proxy servers are used to improve performance, enhance security, and hide activities from others.
Access Blocked Websites
When access to certain websites is blocked, using a proxy server on the Internet allows the user to regain access by contacting the proxy server as an intermediary that isn't subject to blocking.
Most proxy servers cache large and frequently accessed data. If the proxy server is located close to the user, web browser performance will be much faster.
Many educational, governmental and corporate networks restrict access to the internet by filtering undesirable material and websites. In many cases, a user account is required to access the internet via the proxy server to prevent unauthorized users from accessing the network.
Web users who do not want their activities tracked by websites use anonymizing proxy servers to hide their IP address from the websites they're accessing.
A reverse proxy server at a website can take requests from the Internet in an insecure website network and pass those requests to a server inside a secure website network. This is done to improve security for the website's internal servers.