When a customer books via Stora, they are shown a booking confirmation page.
This page URL is always formatted as follows:
https://your-domain.com/booking_complete/-a-unique-number.
For example, a self storage company called We Store would look like this:
https://westore.com/booking_complete/d53d9840-672e-4263-8938-b5aaa6c39485
In order for you to track your bookings, you must tell your analytics platform to look for any URL that begins with /booking_complete.
Contact your analytics provider for help with this, if needed.
You can then set up your conversion funnel, or other tracking criteria, as you require.
Make sure you exclude Stripe as a referrer
You should also add checkout.stripe.com to your Analytics Referral Exclusion list. Here's a guide on how to do that in Google Analytics.