This Extra Field Type is available in Profile Builder 2.0, Hobbyist or Pro.

You can use this extra field type to allow users to add and edit information with html.
You can specify the field title, meta-name to be stored in the database, description and default content.
Also, you can set whether this field should be required or not.

This is how it looks like in the front-end.

Profile Builder - WYSIWYG Field Front-End