Free proxy server is a kind of buffer between your computer and the Internet resources you are accessing. It allows you to bypass content filters and browse your favorite websites anonymously, without revealing your location (IP address).
Web proxy is the easiest way to hide IP. Web proxy is a website with a address bar. Just input the URL of blocked site into that bar and click the "Surf" button. Web proxy will fetch the web page for you showing on its own site. But web proxy isn't compatible with many sites such as hulu and pinterest. Unblock Site is a better choice because it supports all the websites and is faster.