Cached data associated with an Actor using an Ability. -Initialized from an AActor* in InitFromActor -Abilities use this to know what to actor upon. E.g., instead of being coupled to a specific actor class. -These are generally passed around as pointers to support polymorphism. -Projects can overrideUAbilitySystemGlobals::AllocAbilityActorInfoto override the default struct type that is created.