Does a QR code last forever?
The data inside the QR code does not change. If it contains a direct URL, it will keep opening that URL. If the domain expires, the page moves or the link is deleted, the QR still scans but the destination may fail.
Print checklist
Make sure the code is large enough, has quiet space around it and uses strong contrast. Test with real devices before printing on menus, posters, cards or packaging.
Traffic and measurement
QR codes bring offline attention to your site. Short links or UTM parameters make it easier to see which campaign generated visits.