A misused mispelling of n00b or newb popularized by zoomers and YouTubers. The correct terms are:
Newb: short for newbie, someone who is new to a video game
N00b (spelled with zeros): someone who is perpetually terrible at video games in spite of their experience; often used as mockery.
Hayden isn't a noob, he just started playing. He's a newb.
The uncultured, normie misspelling of n00b. Generally refers to someone who is bad at something or new to something. Often used to describe individuals in more broad terms than n00b.
1: This guy has terrible aim, he isn't helping at all. What a noob.
2: He's probably a newb if he hasn't gotten used to the controls.
1: I looked at his profile, he's already played 120 hours of this game.
2: Oh damn, n00b confirmed.