Use cases
Like a Text field can be used to store the title of subsection, similarly a Textarea can be used to store content of this subsection. It can also be used to store additional descriptions or aside blocks of text.
Setup
Min characters length - Required minimum length of text that.
Max characters length - Maximum length of text that can be entered. If 0 is used there is no limit.
Number of rows - how tall this field should be during editing. Reflect how many rows of text can fit the field area.
Example Usage
{% assign sub_text = product.metafields.airf.sub_text %}
{% if sub_text and sub_text != ' ' %}
<p>{{ sub_text }}</p>
{% endif %}
Can be also combined with example from Text field to show title and content of subsection:
<section>
{% assign sub_title = product.metafields.airf.sub_title %}
{% assign sub_text = product.metafields.airf.sub_text %}
{% if sub_title and sub_title != ' ' and sub_text and sub_text != ' ' %}
<h2>{{ sub_title }}</h2>
<p>{{ sub_text }}</p>
{% endif %}
</section>