How it is read
Three prominent corner patterns help the camera find and orient the code. The smaller shapes carry the encoded data and information that helps recover some damage.
What it contains
A QR code can carry a website address, a note, an email link, WiFi credentials, or contact details. The scanner may recognize the format and suggest a relevant action.
What scanning does
A scan reads the payload and generally presents a prompt. Opening a URL still requires the destination to work. A static code can be decoded without internet access.