Send variables through the URL (parameters), also use UTM parameters to track your marketing companies (utm_source, utm_medium, utm_campaign, utm_content, utm_term)
For example, if you want to use “email” and “name” as hidden fields, you need to add this:
?name=john&email=john@gmail.com
We can display these fields in the flow to hyper-personalize the experience, or keep them in the shadow to nurture users’ information.
this is a must…