QR Codes
QR codes are two-dimensional symbols that most of the cameras can scan. Nowadays, the majority of phones and PCs are equipped by default with a QR code feature. Color codes enable the same physical space to convey more information by employing color in any pattern or design that attracts attention, such as a logo. When users capture a color or black-and-white image, the device decodes it and launches the device's browser to link to the URL included in the code.