This is the 2396th most frequent Korean word.
그것을
"It" or "that thing."
In this sentence, '그것을' refers to an item previously mentioned or understood in context.
그것을 가지고 오세요.
Please bring it.
Here, '그것을' is used to refer to a piece of information or knowledge that has been discussed or implied.
내가 그것을 이미 알고 있어요.
I already know that.
In this sentence, '그것을' points to an object or concept for which the usage needs explanation.