QR stands for "Quick Response". While they look simple, QR codes can store lots of data — and when scanned, they give access to that information instantly.

1. Open the QR reader application or the camera on your smartphone.
2. Point it at the QR code — any angle will work.
3. The data is shown on screen instantly; contact details, for example, download straight to your phone.

Download and install a time-based one-time password (TOTP) generator. Here's a good article from Gizmodo covering favourite options. Popular choices around the office:

When prompted by the app, scan or drag and drop this screen's QR code into your authenticator.