To add your ServiceM8 Online Booking form to your Facebook page, use Facebook's "Call to Action" feature. This creates a button in the header of your Facebook page.
Refer to this Facebook help article for instructions on how to create a Call to Action button: https://www.facebook.com/business/help/312169205649942
We recommend using Book Now as the text for the Call to Action button.
The Online Booking form works on mobile devices as well as desktop computers, so there is no need to select iOS- or Android-specific settings when configuring your Facebook Call to Action button.