WoW Legion Timewalking is a classic weekly event where players get to replay the instances from older expansions and earn a lot of rewards. There are actually a number of reasons why Timewalking is useful and should not be missed:
You will earn special currency, which you can spend on all kinds of loot obtainable from the event vendor.
It’s also a chance for you to earn a rep for the factions of that expansion at a higher rate.
Running dungeons during Timewaking is the best way to lvl up your alts as you can get way more XP there.
The buff that makes the faster reputation gain is called the Sign of the Legion, and it will help you get a better standing with them.
Besides all that, this particular Timewlaking event is a fair bit more unique than the rest. Here’s why:
There’s an additional activity that’s available to you called Legion Timewalking Mage Tower.
You can also run the Legion instances on the M+ lvl of difficulty, which will be scaled up to the M+ difficulty peculiar to Shadowlands.
There are more rewards for you to earn than usual, including a completely new and chosen by the community Legion Timewalking mount.