QR Code stands for Quick Response Code. These are machine-readable optical labels that encode information, such as URL links, emails, text and vCards. QR Codes bridge the gap between offline and online quickly and are becoming very popular among the marketing and businesses in their campaigns. For example, they can quickly sign up users digitally via a printed QR code on marketing material or product packaging. They can also help small local businesses get quick feedback from their customers on Google. Restaurants can show a digital touchless Menu to their customers. With the native cameras of both Android and iOS phones, users can scan QR codes without downloading any app, making them very simple and popular.