Precisely the location. Not getting covered by snow is another benefit, it’s nice to see the technology being used more.

That’s partly the reason, that’s why they’re used e.g. for marking bike paths. This has the added benefit of being very noticeable when you’re looking at the ground.

And we’ve nowadays taken it even further, in spoken Finnish we’ve even got rid of the “hän” and mostly use “se”, which is the Finnish word for “it”. The same pronoun is used for people in all forms, animals, items, institutions and so on, and in practice the only case for “hän” is people trying to remind others they consider their pets human.

Context will tell which one it is.