This feature is added since v2.15.1. The purpose of the feature is to provide a custom registration form for the user.
Instead of having email & password only, now you can have extra fields like name, address, phone number, etc…
// Sample Contact form 7 registration form
// hidden fields are optionals
[hidden sendEmailConfirmation1 "true"]
[hidden redirect "/my-account"]
<label> First Name
[text* firstName]
</label>
<label> Last Name
[text* lastName]
</label>
<label> Gender
[select gender "Male" "Female" "Other"]
</label>
<label> Email
[email* email] </label>
<label> Password
[password* password password_min:6]
</label>
<label> Password Confirmation
[password* password_validate password_check:password]
</label>
[submit "Register"]// then you can import the registration form to any page that you want // Remember to add html_id="if-c7-registration-form" [contact-form-7 id="211" title="Registration" html_id="if-c7-registration-form"]