The barcode-like matrix can be scanned by mobile devices directing the user to a URL or telephone number, for example The barcode-like matrix can be scanned by mobile devices directing the user to a URL or telephone number, for example

2. QR codes enable sharing and building community
You can use an app called Likify to create QR codes that connect you with a Like button for your Facebook page. You can also create discounts that are specific to the QR code, and run them in advertisements or post them in a store, and turn them into re-tweets so that people share them with their followers. All this helps you build community.

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