A proxy server is an intermediary server which comes between you and the website you want to access. While using a proxy server, the internet traffic you initiated will pass through the proxy server an then to the destination website. The destination website will return the results back to you through the proxy server. Why should use it in the first place if it only acts as an intermediator? A proxy server provide different levels of security, functions and privacy depending on what you need. Proxies can be used for a wide variety of use cases which include anonymous browsing, social media, scraping, etc.