@Stahesh 2 weeks vacation per year used to be standard. If you don't use your vacation days, they owe you money equivalent to them when you quit or if you get fired.
So companies came up with "unlimited" vacation. This means, instead of being entitled to 2 weeks, you get as much or as little as your manager wants to give you. When you quit, or if you get fired, the company owes you nothing.
Stupid people really think you can take 180 vacation days a year because it's "unlimited."