How to track the page that led to the form submission

Hello people! I am very new to squarespace and this is my first website ever! I really need your help with an issue.

There are multiple pages each with a different idea for a Tour. But only one Tour Booking Form page. When someone requests a Tour, I'd like to know from which page he ended up to the Booking Form, for me to know which Tour he wants. I read something with a hidden field, but no idea what to do. Thank you!

I'm not sure if there's an out-of-the-box way to do this (or any other way apart from maybe setting up something in Google Analytics?!) but you could consider having a form on each tour page - then you could set the form name to have the page name in it, e.g. Contact form - X tour - so that way it'll appear in the subject line of the email you receive but doesn't affect the person submitting.

I thought about it, but i am trying to see if there is a more efficient way, without having to create so many different forms. In any case, thank you for the response!