Tor is a toolset for organizations and people that want to improve their safety and security on the Internet. Using Tor can help you anonymize Web browsing and publishing, instant messaging, IRC, SSH, and other applications that use the TCP protocol. Tor also provides a platform on which software developers can build new applications with built-in anonymity, safety, and privacy features.Communications are bounced around a distributed network of servers, called onion routers. Instead of taking a direct route from source to destination, data packets on the Tor network take a random pathway through several servers that cover your tracks so no observer at any single point can tell where the data came from or where it's going. This makes it hard for recipients, observers, and even the onion routers themselves to figure out who and where you are.
Tor's technology aims to provide Internet users with protection against "traffic analysis," a form of network surveillance that threatens personal anonymity and privacy, confidential business activities and relationships, and state security.
I have nothing to hide but that doesn't mean I don't have things of value to third parties - everyone from google up is gathering information I don't want them to from my online activities or my personal information, and selling them off. When at home I sometimes leave my PC on as a node, thinking that maybe I am helping someone get information their government is censoring.You can download and set it up by visiting Tor's Official Website.