eli5: How can Google maps know many small and recent businesses’ locations so accurately?

Question

I’ve realised that most businesses (even small kiosks) are seen on Google maps. Where and how do they get that information?

In: 2928

Answer 1

I once received a call while working at blockbuster, it was from Google asking if we were still a blockbuster and if “blah blah Blvd” was still the address; so apparently they sometimes just straight up call to check.