All customer bookings made online via your Shop front, will automatically be tagged with a Website label in the Sales Channel field.
You can get a list of all 'Website' orders placed online per day by using the Received Date filter on your Orders page allowing you to track how often online bookings are made for your spa.
To do this head to Orders.
Use the 'Sales channel' filter and select 'Website' to view all bookings that have been made online.
To keep track of this daily you can go to this page select 'Website' and then also select a 'Received date' therefore, this will give you all online bookings that were received on that particular date.
If you would like to you can also export this information into an excel spreadsheet by selecting 'Export'.