WoW Leveling is a process of increasing your current in-game level and trying to raise it to the maximum level cap. Almost every activity in the game will give you XP, and some will reward you with more of it compared to other activities. Here are some examples of how you can get done with leveling in Shadowlands:
Quests
Dungeons
Heirlooms
Exploring the expansion
Resting (the rest bonus is real)
Almost any activity in the game can lead to a great XP boost. However, the process might take some time, which means that no matter what you do, you’ll still have to wait before you unlock the max level.