Have you ever seen these blocky little icons hanging out in the corner of an ad or on a product box? That’s a useful little tool called a QR code.
A QR code (abbreviated from Quick Response code) is a type of matrix barcode (or two-dimensional code) designed to be read by smartphones. The code consists of black modules arranged in a square pattern on a white background. The information encoded may be text, a URL, or other data.
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