iFrame webforms are designed to be embedded into your website. You can use the drag and drop form builder to design the form to collect exactly the information required. The size of the form can be adjusted to suit the available dimensions available on your website. The most common iFrame webform would be the Contact Us form added to your website as in the example below:
NOTE - CRM fields need to be pre-filled in webforms are they are not searchable by third parties to protect the privacy of your account.