You might need more than the name, e-mail and the password of your potential customers. The fields tab will allow you to access a form to create new custom fields for your registration page.
You are able to create fields of different types: short text, integer, profile picture, select box, radio button, checkbox, textarea, file, date, country select
Be sure to take advantage of these different types to optimize the registration experience.
You may choose whether or not the field is a mandatory field to be filled in, and where it will be displayed also (admin table and user profile).