Teleport lets you see any webpage the same way it would be seen by someone in your chosen country. You can use it to check if a particular website is censored in a particular country. You can use it to fool a website about your location and access content that is limited to specific countries. Or you can just use it to unblock a website blocked on your network.
To achieve this Teleport uses so called proxy servers located in the destination country. Instead of sending you directly to the webpage you've requested, Teleport fetches the webpage via a proxy server and displays it to you. Thus, your web browser doesn't connect directly to the target site's server and instead of your IP address the server "sees" the IP address of the proxy.