Can someone please explain to me what is the difference between the owner and the source of a gameplay ability?
For example: in the gameplay abilities page of the wiki page it says:
Activation Required Tags: The Owner has to have these tags BEFOREHAND so that it may become activatable. Great for, say, buffs that allow you access to strong abilities, or perhaps status effect-purging abilities that are only activatable as you are affected by the status effect at hand.
Source Required Tags: The source must have these tags. What the system considers “source tags” is not immediately obvious because it isn’t explained anywhere, but you can trigger abilities with payloads containing this information using a feature called GameplayEvents, which are detailed much further down below. The GameplayEvent will pass a struct which you can fill out as you please beforehand, with the InstigatorTags in that struct acting as the tags used in the Source Required and Source Blocked checks. When the payload contains all tags here specified in some capacity, the ability activation is allowed.
But I have not understood the difference between the two.