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Once a person sees a QR Code, they know instantly that they can scan it with a mobile phone camera and get the content. This will make it much easier for your customers to open your forms with minimal effort.
Modern era customers love the convenience of a QR Code. For them it does not involve any typing and can simply be opened with the mobile phone camera.
You can literally print out a QR Code and put it anywhere. This allows for a wide array of use. Popular places for QR Codes are doors, walls, back-side or products and similar places.