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QR codes have their place but aren't effective in advertising

One of the first apps I downloaded when I bought my smartphone was a QR code reader. I couldn't wait to unlock the mysteries behind all those crossword puzzle-like squares. Turns out, I wasn't missing much. I've used the app less than 10 times. QR (quick response) codes became all the rage a few years ago as a cool way to revolutionize advertising. The technology wasn't new, but it opened up fresh ways to reach mobile-savvy customers.

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