The inventory is allowed by default. So as long as you add items to inventory, you can use it. However, these nodes can be used to allow/forbid inventory specifically.
Behavior
Toggles the user ability to open inventory and taking items from inventory to hands.
See Set Inventory node for actually initializing inventory with items:Set Inventory
Usages
In some parts of your training scenario you might want to prevent users from opening the inventory. In such cases these nodes will be handy.
States
None, node is instant