The players can increase their level by certain number of experience points.

When players gain enough experience points, they can buy new skills.

If enough experience points are acquired, a character's level will increase.

I know from an experience point of view it's a much different situation.

After building up enough experience points, it will gain a new level.

Characters may learn at any time, only limited by their experience points.

The level increases when the player has spent a certain amount of experience points.

It is also used to track experience points and levels.

This is the most common way and in the case of death, no experience points are lost.

In the case of death, experience points can be lost if hit by monsters at the same time.