Winds XP Buff
Before Shadowlands launched, there was a special buff to XP called Winds of Wisdom that a lot of players took advantage of to get to max level in time for Shadowlands.
Taking advantage of the Winds of Wisdom buff? Here are some pointers on how to maximize your leveling efficiency
To my mind, there are two separate paths to discuss when talking about the Winds of Wisdom buff that's currently active in World of Warcraft -- there's using it on that 110 or above alt to get them to 120, and there's using it on a fresh or significantly under the level cap character, potentially even a first character if you're just starting World of Warcraft now.