Jailbroken?

[chrisuk013]

I was looking on eBay for an apple tv device and I have noticed that some of the auctions use the term 'jailbroken'.. Can someone explain this term to me and what extra if any i can expect?

Thank you

[Jomlett]

Jailbreaking is the process of removing limitations on iOS, Apple's operating system on devices running it through the use of software and hardware exploits; such devices include the iPhone, iPod touch, iPad, and second-generation Apple TV.

Jailbreaking permits root access to the iOS file system and manager, allowing the download of additional applications, extensions, and themes that are unavailable through the official Apple App Store