Collect marketing data with custom account registration fields. Add custom text or a custom checkbox, radio button, dropdown menu etc. to your Magento 2 signup form. Magento 2 Customer Attributes or Custom Registration Fields will allow the admin to create custom fields for user or customers. Using this module you can extend your customer signup form. As magento 2 default custom registration form is not extendable, magento 2 customer attributes or custom registration extension is perfect choice for the store owners to extend custom fields for sign up form.