How Web Proxies Work
Basically a web proxy works like the following:
- You visit the web proxy site and it shows a regular website with a text input.
- Enter the address of the site you originally wanted to visit, like Facebook.com and hit "Go".
- Facebook loads and you can browse around!
Even though Facebook was blocked a minute ago, and you didn't change any technical details on your computer, you can still browse it. How does it do that?
How it looks like when you try to visit a blocked page without using us

And how it looks like when going through Unblock & Bypass..

What the first web proxy site you visited does is to pass on everything you're doing to Facebook. Then Facebook passes that back to the web proxy which sends it to you, so your computer never created a connection to the blocked site, just the web proxy.
It's basically a middleman. You talk to a friend and he or she passes it on to someone else. You never talk to anyone but your friend. The difference with web proxies is that it's done through computers and the internet; passing it forward and back is completed in milliseconds!