Each contact in HubSpot has a First Conversion property that contains the page and form that they first converted on - so this can be used to identify interest.
If you want to store this in a property, and not have it overwritten each time a new form is submitted, you will need to use a HubSpot workflow to set the value of a custom property based on the title of the page on which they converted.
I understand that the property is called "First referring site" or "hs_analytics_first_referrer" (in its internal name) do you know how i can apply this property within my registration form so it can be viewed inside the contact info?
*(I also dont have Hubspot premium so i can not access HubSpot workflow)
This is how my registration.php look like so far :