QR - Quick Response. QR codes store a lot of data. When scanned, the QR code allows the user to access information instantly – hence it's called Quick Response code or QR Code.
When you create a space using Fectar Studio, Fectar Studio creates a QR Code with the information of your space. When you scan this QR Code using the Fectar app you will be able to instantly view your space in Augmented Reality or 3D Viewer.