"Rooting" and "Jailbreaking"

Rooting(term used for android phones) means to access the phone with administrative rights, to modify the system

Jailbreaking(term used for iphone)

A jailbreak is simply the ability to run apps and use themes and tweaks not approved by Apple. Jailbreaking doesn't slow down your device or use any extra battery. A jailbreak lets your device be how you want it. Visit here to Jailbreak your iphone, from the phone itself