Tor Browser protects you against a common form of Internet surveillance known as “traffic analysis.”
Traffic analysis can be used to infer who is talking to whom over a public network.
Tor Browser is based on three fundamental ideas: it prevents anyone from knowing which webs you browse, it lures you away from sites that try to find out your physical location and it allows you to access blocked websites.
It works well with any web browser, instant messaging client, and many other applications that access the network. It’s supported on Linux, Android, Microsoft Windows and Mac OS X operating systems.
It’s best to use Tor when you really want to hide your online activity from someone, but especially when you are in public networks.