Your Business ID in WebReserv is the identifier of your business as setup in WebReserv. It is automatically created when you set up the account and used within the booking widget for the online booking calendar.
In some cases, you may need to know the Business ID for API and tracking information. You can find your business ID in your account through the Website tab.
The Business ID is the text listed after your WebReserv listing link:
The Business ID is also shown in the HTML code that you used to embed the calendar on your website: