How do I use the "ADD MARK" in a widget animation?

Hi guys,

I have a widget which displays a typeface logo which moves across the screen from left to right. I used the “+Animation” in the widget blueprint for this.

I now want to be notified when the animated logo passes a specific location on the screen while moving from left to right. At first I tried this using a “delay”. The problem with this is that it is not precise enough. I then saw that there is “Add Mark” which can be placed on the timeline at the exact location where the logo passes the point.

Is this a mark a time reference that can be called upon from blueprint?

If yes could someone tell me how to use this feature. If not then maybe someone has an idea how I can achieve my goal.