A QR code business card is a standard printed card that includes a scannable QR code, linking to a website, portfolio, digital contact card, or booking page when scanned with a smartphone camera.
It's an efficient way to pack more information — or a next action — into a card without cluttering the print layout with extra text or a long list of links.
The most effective use is linking to something with a clear next step (a portfolio, a booking page, a digital contact save) rather than just a generic homepage, so the scan itself has a specific, useful purpose.