(Prefer to watch this tutorial? Click here!)
You can add and manage your points from the left panel under Points.
Select Add point and click again on the map to place it where you want it. Alternatively, you can click on the pin icon on the top (see white arrow) and then again on the map where you want to place it.
The green area around the point visualises the triggering radius, you can change this by clicking on the point itself and adjusting it under Radius (in meters).