The strings type one that is a mixture of the string and text type. It renders as a multi-line text area in the admin but the template will see each line of text separately. It's primarily useful for some advanced scenarios where enumerations and other things should be rendered.

Field Usage

label = Things to buy
type = strings
description = A list of things that would be good to buy

Template Usage

<h2>Shopping List</h2>
{% for item in this.things_to_buy %}
  <li>{{ item }}</li>
{% endfor %}