To activate Nuki Web, you need a Bridge. You additionally need a stable connection between the Smart Lock and the Bridge (Tips to improve the connection quality). Select the desired Smart Lock in the Nuki app and go to the lock settings. Afterwards, select "Activate Nuki Web" in Manage Smart Lock. Follow the instructions in the Nuki app. For security reasons, each Smart Lock must be activated separately to control them via Nuki Web.