Unblock Facebook is a free web service which enables you to access any website( such as Google, MSN, NYtimes, Tumblr, Reddit, Imgur, PInterest ) anonymously.
What is a web proxy, and how does it work?
When you access a website( such as Reddit ) directly without using a web proxy or VPN service, the website owner will know your real IP address, even if you are surfing the website in private or incognito mode. If your company or school has blocked the domain name of the target website, then you'll not able to access it and get the content of it.
A web proxy usually has one or multiple servers, when you use it to access a website, the proxy fetches the content to its server, then send the content to your computer or smartphone, the target site does not know that you've accessed it, and does not know your real IP address, it can only get the IP address of the proxy server. Thus even if the target website is blocked in your country, it doesn't matter, you can still access it through a web proxy.
This means that you can surf any website without reveal your real IP address, the target website doesn't know who you are, which country you are located in. You ISP or school will know you've accessed the web proxy, but doesn't know which target site you've accessed.
There are multiple proxy servers located in different countries and cities which you can choose from, if one of them does not work temporarily, you can switch to another one.
Please don't log into your important accounts with this free web proxy, if you want to encrypt your internet connections of your Apps, you can set up a VPN( PPTP, L2TP, or OpenVPN, etc. ) on your own VPS or dedicated server, then you can encrypt the connection of your SnapChat, Whatsapp or other Apps.