What are QR codes useful for?

They are as useful as all the different types of content they can offer. In fact, in recent years, this type of code is becoming more widely accepted among all kinds of people. It's logical since with just one scan you can access a variety of different information and even facilitate certain tasks such as connecting to a Wi-Fi network. A QR code can help you improve the service or product you offer, interact with your customers and promote your business, among other things.