I’ve made a lot of forms that required Multi-steps over the past 10 years.
I was always interested in how to make them intuitive and clear in what was required of the user for each input.
Just the other day I turned up this reference on the latest form constraints that produce the highest rate of User COMPLETION. How to keep a User stepping through form sections until they Submit vs until they quit out of boredom, frustration, uncertainty. etc.
I’m now using this information as I design my latest multi-step form.