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.
The world is large and we are small, so we can't yet put our servers in all (or even many) countries. Most of the proxy servers we use are operated by third parties we are not affiliated with. So when using Teleport it's worth keeping in mind that your traffic will be passing through unknown, untrusted and potentially malicious servers. Thus you should never submit any sensitive information (like passwords or credit card numbers) to websites when browsing via Teleport. Even if you trust the destination site and Teleport your data can still be intercepted in transit.
In some countries however we do have our own proxy servers. These servers will be marked as "trusted" in the list and used by default when teleporting to such country.
Q: I am trying to open site X from country Y, but it doesn't work - why?
A: The most common reason for this (aside from the site X being blocked by the country Y's government) is a dead proxy. We check the proxies regularly, but their lifespan is often short. Try selecting a different proxy from the list.
Q: Can't I do the same by looking up a proxy in my target country and configuring my browser to use it?
A: Sure, only it'll take you 10x as much time as typing the URL into Teleport. And you can end up leaking your cookies in the process.
Q: Who operates the non-trusted proxy servers?
A: The non-trusted proxy servers we use are so called "open proxies". Most of them are likely just misconfigured servers whose owners made them publicly accessible by accident. Some are possibly run by anti-censorship activists. And some are certainly operated by cybercriminals as honeypots for stealing passwords and other sensitive information.