keys are very important because we need to get to our house everyday, but some people have a punch-in code. So why do we need keys? for example not all jobs have punch-in codes so that is very beneficial, at certain jobs they have lockers that requires a master key and schools need a master key too, some people like privacy in their rooms so keys are very helpful, but also a key usually comes with a spare key, I personally think you should always carry around spare keys (just is case)
