Gameplay Tags are used in many unreal systems. See the Unreal Documentation on Gameplay Tags for more details.
FGameplayTag will automatically be bound to the global namespace
GameplayTags. All non-alphanumeric characters, including the dot separators, are turned into underscore
// Assuming there is a GameplayTag named "UI.Action.Escape"
FGameplayTag TheTag = GameplayTags::UI_Action_Escape;