Rooting is the Android equivalent of jailbreaking, a means of unlocking the operating system so you can install unapproved apps, deleted unwanted bloatware, update the OS, replace the firmware, overclock (or underclock) the processor, customize anything and so on.
Ikaw po magrorooted nan boss, wala kasi atang phone na pag binili mo, nakarooted ng dati. Meron pong superuser permission yan para sa mga apps mo na di supported ng phone mo