Use a readable short URL when people may hear, type, copy, or share the address. Use a QR code for print or signage when the intended action is a phone scan. The same destination can be offered both ways for accessibility and convenience.
Before distributing either, confirm the destination, test redirects, and check whether the short-link service is likely to remain available. For a QR code, scan the final printed size on more than one device. Neither format proves the destination is trustworthy; users should be able to inspect the address.
Do not put private tokens in either link.