They don't. They push you down the search results through SEO and link-farming on their giant web empire.
Anecdata: my neighbour runs a doggy day care. She's been flooded with 1 star reviews (clearly not from her customers), and received similar coercive phones calls to help her improve her online presence. Not much she can do about it, as Google is not particularly responsive
The US made leaving fake reviews illegal this year. If they ever start enforcing it, its thousands per fake review.
What if those reviews come outside US? Can they force Google to take them down?
It is trivial to hire someone in Asia to do these kind of fake reviews
Probably fair to say someone in Asia hasn't used a US-based dog daycare provider and should have those comments dropped.