QR codes link physical objects to online information and experiences. They can be scanned by smartphones and dedicated devices to access webpages, contact info, or other digital content. Marketers are increasingly using QR codes in advertising campaigns to track engagement and measure return on investment. Examples include linking movie posters to trailers, Facebook profiles to contact pages, and business cards to company websites. As the technology evolves, QR codes may see expanded use in education, social media, and more complex commercial applications.

1. QR Barcode “ Mobile tagging”

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