In general, assuming you have an easy-to-use QR scanner, it's easier to scan a QR code than type in a URL on a phone, especially a complicated one. A couple examples I've run into recently:

- Lately it's been pretty common for restaurants to replace their physical menus with a QR code on the table that links to their online menu.

- When I've taken COVID tests recently, the site gives me a sticker with a QR code that links to my results page.

- I encoded my wifi network/password into a QR code and printed it out, so guests can just scan it to join, rather than have to scroll and find the right network and type in a password.