To enable tracking of bookings coming from your own website, cross-site tracking must be activated in your Google Analytics account. This is explained here: [GA4] Set up cross-domain measurement - Analytics Help (google.com). The snippet from your Google Analytics account must then be stored in the "Tracking Code" function.
You can use the following URL patterns to measure booking milestones:
- Website visit: Page URL contains: .belbo.com
- Successful booking: Page URL contains: .belbo.com/finalConfirmation/success