First, refer to the 'Adding a Widget' Solution.

Click continue after selecting the QR Code widget.

There are different QR types to choose from: URL, Coupon, Contact, Telephone, Email, Location, and SMS.  Depending on the tag you choose, enter the appropriate information and duration.

Name the QR Tag and select type from down.  Refer below to a URL tag.  Click preview to see sample and click save.