Jailbreaking allows users to install unauthorized apps, customize their iOS interface, and remove restrictions. It gives the user root access to the operating system. Yalu is a website that hosts jailbreak versions for different iOS releases. To jailbreak, users must check device compatibility, back up data, disable security features, connect the device to a computer, use Cydia Impactor to sign and install the Yalu app, trust the app, run Yalu to install Cydia, and then Cydia will be available after a restart.