Objective: To understand what an Input Action Asset is in Unity.
What is an Input Action Asset?
This type of asset in Unity holds the bindings and control schemes with their associated Input Actions into an Action Map. It is an asset that sits in your project folder in Unity and can be simply created by right clicking → Create → Input Actions. It will then create this icon:
When opened it pops up an Input Action window:
This window is segregated into 3 different sections for Action Maps, the associated Actions in the Action Maps and the Bindings for these Actions.
By default this window might come up blank and you would get started by creating an Action Map.
See next article for an introduction to Action Maps, why you should use them and how to set them up.