I’m thinking about changing the way I do the descriptions for my longer posts (the Talk about books “newsletter” ones). The description is used in the Twitter card for the post, the regular “description” meta tag, and on the archive page for the “newsletter” posts. I’ve been inserting them using a JSON data template. In future, I’d like to put the description in the first paragraph of the post, but hidden using a display: none; style. I’m not sure if that will work in the email. If not, I might have to do something else there, like style the description with small italic text to make it clear it’s not part of the post. I’ll probably experiment with that at the weekend.