Okay, folks. The Dungeon Master’s Guild market/license for D&D stuff is a great opportunity and a lot of fun. I get why so many of you are eager to get material up there ASAP. But I hope you’ll accept a bit of free advice from someone who’s both a fan and a professional.
You need to know how to put a sentence together, and you need to have your work read over by other people who know how to put a sentence together. I promise you–promise–that if you have obvious typos or overtly poor grammar in your product description, a lot of people are never going to even look at the product itself, let alone spend any money on it. There are many people who have already lost me as a potential customer based on a single sentence of their product entry, because it was so poorly written that I don’t trust them to be able to deliver a usable product.
Take your time and do it right.