Multiple Attributes/Components for Phone Presence

I use my phone for presence detection. When looking in the IDE, I noticed this. Can someone explain what this is and why it exists this way? TIA

That is how I would expect your mobile presence device to look if you have added three ‘Linked Places’ to your Location. The ‘main’ component has the presence sensor for your Location. The other components are the presence sensors for your Linked Places.

Ah, that makes sense and exactly the answer I was looking for. Much appreciated.