In order to acquire a client's address, create a mobile service.
1) Navigate to Settings > Services and click 'Add New Service' button.
2) In the service settings select 'Mobile service (client's address required)' option and click 'Save'.
3) Now, when clients book online, they will be required to enter their address (to the location that the Staff will need to travel).
4) Staff will see client's address in the appointment window. Staff will be able to edit the location or directly load mobile address in Google Maps.
Staff will receive an email confirmation with client's address.
You can also add client's address to the 'Client Email Notification Messages' by using {CUSTOMER_MOBILE_ADDRESS} variable.