Digital Key can best be described as an equivalent of a traditional tag or keyfob; it allows you to use your phone as a tag. If the site you are a user of has hardware that supports Digital Key, it will be automatically enabled in your mobile app.
In order to open a lock with your digital key, press the digital key icon in your app or widget and tap the lock reader with your phone to wake it up. The Digital Key will be sent to the lock, which will respond as usual.
Please reach out to Salto support if you encounter issues using your Digital Key.