Is it possible to root a iPhone and what can you do on it if it is rooted?

Is it possible to root a iPhone and what can you do on it if it is rooted?

You can't root an iPhone. Rooting is a term used in Android to make it 'more' customizable and the reason I use the word more is because it is already very customizable.

For iPhone, 'rooting' is referred to as Jailbreaking, which removes Almost all iPhone restrictions, which means you can download software and things like that which Apple does not usually allow. For example you can emulate GBA (Gameboy Advanced) games that Apple doesn't usually allow.

So, that is what 'rooting' for iPhone does, but most people won't understand what that means because it is referred to as Jailbreaking for iPhone.

Rooting concerns Android devices, not iPhones. The equivalent is jailbreaking & much like rooting it opens up the operating system to more customization, manipulation, etc.