For example, an Iowa district court in November 2006 halted all sales of See Clearly Method kits that had been marketed for several years by a company called Vision Improvement Technologies as a way to improve vision through eye exercises.
Jailbreaking is a hack that allows developers to access the file system of your iPhone, iPad, iPod Touch, meaning the root directory. In simpler terms it means that developers can now have access to all the files on your iPhone, iPod Touch, iPad meaning they can create apps that are possible of doing pretty much anything.
The Advantage of Jailbreaking an IPod Touch or an IPhone are: You can change the settings of your IPhone or IPod Touch depending on what you prefer rather than the default settings of Apple. By doing this, it allows your IPod Touch or IPhone to do more rather than just handling music and videos. You can install additional applications that are not introduced by Apple.