Go to Asia and you can see QR codes everywhere. Payments mostly, but in Singapore you will find it also for checking in and out of places for COVID-19 contact tracing and everyone uses it (although now Bluetooth/ tap your phone is taking over).
I use it for guests wanting my wifi - just scan this QR and you’re in without much fuss.
I use it for guests wanting my wifi - just scan this QR and you’re in without much fuss.