A proxy script is also known as an auto-config file. A proxy script helps connect to the Internet while using Proxies. When connecting to a particular website, your browser automatically uses one proxy service that is suitable for this case. Depending on your needs, you can choose how your browser will connect to a proxy. For instance, you can simply fill in the port number and the name of the proxy service and automatically use it for visiting all websites. Another option is suitable for advanced users that deal with more complicated tasks. They might want to use a proxy script for it to select different Proxies for different websites.