Your unarmed strikes are so fast it can have double the amount of attacks you can usually make, protect yourself against melee and ranged attacks, and many other things.

Barrage Stance

As an action or bonus action, you can spend 1 Ki point to enter a barrage stance. When you do, you can make 1 unarmed strike. While in this stance, your speed decreases by 30, and you can't use Stunning Strike. Also, you can make *double the amount of attacks you were normally able to make, as long as they are all unarmed strikes.
*(Ex: you can make 2 unarmed strikes for opportunity attacks, melee attacks granted by the Haste spell, the Martial Arts feature, and anything else that says you make 1 melee attack. And, you can make 4 unarmed strikes for the Monk's Extra Attack and Flurry of Blows, and anything else that says you make 2 melee attacks. If you could make any higher number of melee attacks, it still doubles).

All enemies that can see or hear you must make an intelligence saving throw against your spell save DC or 8 + your proficiency bonus + your wisdom modifier. If they fail, they cannot move more than 5 feet away from you every turn. They can retry the saving throw at the end of their turn. You can enter this stance a number of times equal to your wisdom modifier per short or long rest, and you can exit this stance as an action or bonus action. Otherwise, it lasts for 1 minute.

Fists of Protection

You gain the ability to punch away melee and ranged attacks directed at you. You can cast the Shield spell using 1 Ki point. Your spellcasting ability is Wisdom. The spell's duration becomes instantaneous, but If you are in Barrage Stance, you can cast it for 0 Ki points.

Supersonic Strikes

When you use the Flurry of Blows feature, you can spend 4 Ki points instead of 1 to make your fists gain the effect of the Gust of Wind spell. You can cast this spell without Somatic or Material components. The spell's duration becomes instantaneous, and creatures in the line are immediately affected instead of having to start their turn there to be affected. If you are in Barrage Stance, this feature costs 2 Ki points instead of 4.

Stance Master

You learn 2 more stances: the Mobile Stance and the Mobile Barrage Stance.

• You can enter the Mobile Stance using 2 Ki points. While in this stance, your movement speed doubles, and your Unarmed Strikes gain the effect of the disengage action.
  
  
• You can enter the Mobile Barrage Stance for 4 Ki Points. While in this stance, you can make double the amount of attacks you could normally make. Your movement speed is not decreased nor increased, and you can use Stunning Strike. Your Unarmed Strikes gain the effect of the disengage action.