QR codes are those small square codes people scan with their phone camera. In marketing, they are used to move people from offline to online without stress. A business can place a QR code on flyers, posters, product packs, or shop windows. When scanned, it can open a website, show a product page, play a video, or collect contact details. This saves people from typing long links. It also works well for quick offers or event details. When used well, QR codes make access fast and simple. How useful do you think QR codes still are today?