To enable remote access.

Unless I'm mistaken, the docking station doesn't need wifi, but the lawnmower does, to update the notifications on the app, to give the current status, etc. But it works without a connection too, but if it's blocked, no notifications will be sent, you won't be able to stop a cycle, etc. without going near it via bluetooth.

Map creation and basic configuration also work via Bluetooth. However, Wi-Fi is required for firmware updates, cloud synchronisation and faster data transfer (e.g. for multiple maps).