Why I built this
Most themes don't come with a description section. They only let you output the product description in a block, at the top-right of the page ↗ amongst the buy buttons and other info.
That's a problem if you have a really long description. It takes up too much space.
I prefer to have a short summary at the top, and then a longer, detailed description as a full-width section lower on the page. That's what this section does. And I'm using it right here on this page!
This section outputs the main "Description" field from your product admin page. This is not a richtext section, nor is it some kind of secondary description.
Also use it on collection pages
You can also use this section for your collection pages. It will output your collection description.
Most themes will output your collection description at the top - above your product grid. The problem with this is that if it's too long it pushes the products down the page. But a longer description is the best thing for SEO!
Using this section you can instead display a quick summary at the top (using a richtext section), and output your main description below the product grid, making it as long and content-rich as you want.