A level in poker is a predetermined period in which the blinds will remain the same during a tournament. As the tournament progresses, the blinds will increase with each level.
Level Poker Example:
Let’s say you’re playing a live poker tournament, and you receive a thousand chips. The levels increase every 30 minutes. Your first big blind is 20 chips. The blinds will gradually increase so that the final big blind you post will be 1,000 chips.