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 The QR code was first created in the automotive industry in Japan. It was invented in 1994 by Denso Wavea and It uses four standardized encoding modes;

• Numeric,
• Alphanumeric,
• Byte/Binary and
• Kanji.

QR Code gained fast popularity outside the automotive industry because of its fast readability and capability to store more data. The applications in which it started being used were; time tracking, product tracking, product identification, document management, and marketing. This code consists of black squares with various undecipherable patterns arranged in a square grid on a white background. The data is extracted from patterns in both the horizontal and vertical components of the image.

The use of QR codes in commercial advertising is increasing. They have become the focus of advertising. Since the QR code can be scanned by smartphones their usage is increasing to access retailers' websites. By scanning the code visitors go directly to the website that they want to visit without having to enter a URL address. In some countries, QR codes have been introduced on identification cards and some banks are even using them on debit cards. The ease of generating unique QR codes and of reading them has raised their popularity.

Previous barcodes were single-dimensional and needed special barcode readers to read; on the other hand, QR codes don’t need any special equipment to generate or to read. Also, every QR code is unique which minimizes the chances of it being duplicated and misused. QR codes are being used across various industries like; mobile phones, virtual stores, code payments, website login, and video games.

Because of their flexibility in encoding, creating, and reading QR codes will see an increase in usage. You can create your own QR code, a QR code with a logo can be created for businesses, and their usage to access websites will also increase. The size of the QR code can vary, therefore it makes it easier for businesses to create, print, and paste them on products.