An address, a place name or coordinates.
Coordinates as latitude, longitude: 37.7955, -122.3937
Directions start from wherever the person is when they open the link. Google Maps and Waze links open on most phones. Apple Maps links work best on iPhone and Mac; elsewhere they open in a browser.
The link the QR code opens, part by part.
Google Maps
https://www.google.com/maps/search/?api=1&query=1%20Ferry%20Building%2C%20San%20Francisco%2C%20CA%2094111
Google Maps directions
https://www.google.com/maps/dir/?api=1&destination=1%20Ferry%20Building%2C%20San%20Francisco%2C%20CA%2094111&travelmode=driving
Apple Maps
https://maps.apple.com/?q=1%20Ferry%20Building%2C%20San%20Francisco%2C%20CA%2094111
Apple Maps directions
https://maps.apple.com/?daddr=1%20Ferry%20Building%2C%20San%20Francisco%2C%20CA%2094111&dirflg=d
Waze
https://waze.com/ul?q=1%20Ferry%20Building%2C%20San%20Francisco%2C%20CA%2094111&navigate=yes
Searching an address shows the closest match. If it lands on the wrong spot, add the city and ZIP or use coordinates.
Free Maps Link Generator by Hiyaly