Paid time off (PTO) is basically a pool of paid leave days your company gives you each year, and you can use them for vacation, personal work, or even sick days, depending on the policy. Some companies give a fixed number upfront, while others use an accrual system where you earn days monthly. You usually have to request time off in advance and get approval, and unused days may either roll over, expire, or get paid out when you leave. This part really varies by company, so it’s always worth checking the exact policy.