Finding your Place ID
Open Google’s Place ID finder (search "Google Place ID finder" — it is on developers.google.com), type your business name as it appears on Maps, and copy the ID that appears (it looks like ChIJ…). That ID is stable, public and safe to use.
Alternative: in your Google Business Profile dashboard, "Ask for reviews" gives you a short share link directly — paste that here instead and we will build the QR code for it.