Check this Monster Hunter World: Ice Borne guide on how to use the training area, how you can access it, & what you can do in the training area.
What Is The Training Area
A Place Where You Can Test & Practice Weapons
The training area allows you to familiarize yourself with the different weapons of Monster Hunter World. In here, possible combos of your weapons are displayed, for you to test the timing of inputs.
See Possible Weapon Combos
As you perform combos, each possible succeeding command is displayed so you'd know which to input to next. This allows you to practice and get used to the moves & attacks of your specific weapon.
Check Weapon Damage On Barrels
In the training area, you can test out your weapon's damage using the area's barrels. This gives you vital information about your weapon for you to tweak and optimize as needed.
Test Weapon Effect On Barrels & Wooden Pillar
Barrels represent hard surfaces, like the armor of monsters you hunt, while the pillar in the middle represents soft fleshy surfaces, such as monster weakspots. Practice your combos on these surfaces to see how much damage you deal on different surfaces.Check Out What Are Breakable Parts Here!
Practice Your Character's Movement
Weapons also affect how your character moves. You're free to practice this as well in the training area. There's a slope where you can practice sliding attacks, as well as wedge beetles for aerial attacks.
Items Are Not Consumed
Consumable items are not consumed in the training area, so weapons using consumable ammunition like Bow Guns, as well as attack boost items like Demon Powder will not be consumed.
How To Find The Training Area
Access Via Fast Travel In World Map
The training area is found is in Astera when accessing via the World Map. Simply select it to transport you to the training area.
Talk To Your Room's Housekeeper
You can also access the training area by going to the housekeeper in your room and selecting "Go To The Training Area" from the menu.