As an example, open the browser and long press on the url and select Copy to Clipboard. Go back to the scanner, click Share and then the clipboard button. The app then creates and displays the QRcode on the phone. The QRCode can then be scanned by another phone running the scanner.
If you want to create a QRCode to post or save on your pc/phone go to: QR Code Generator
Turn the resolution down on your monitor, I run high rez on mine and it takes forever to scan QR's if ever, turning down the rez and it pops them off instantly.