First and foremost, follow the specific HN guidelines for Show HN postings (https://news.ycombinator.com/showhn.html https://news.ycombinator.com/showhn.html).

First and foremost, follow the specific HN guidelines for Show HN postings (https://news.ycombinator.com/showhn.html https://news.ycombinator.com/showhn.html). Don't write your explanatory posting(s) in your Show HN thread in a way that looks like trashy advertising. If it is something you personally built, surely there is some interesting background about why you you were inspired to create it or the way that it was constructed that can be shared. If your Show HN looks like merely an ad, it will be treated like merely an ad.