Is it the story about the square? Usually technical stories with a few relevant photos or graphics get more traction, but it's hard to guess what the hivemind will upvote.
Take a look at https://news.ycombinator.com/newsguidelines.html and https://news.ycombinator.com/newsfaq.html . You may repost it a few times, wait a few days, but beware that reposting it too many times will get people annoyed and they may flag your post.
But seriously I have tried to market quite a few things and the normal condition is that people are indifferent and you have to work about 25x harder than you think [1] to get people's attention. Maybe 1 time in 10 or less you have something that resonates with people and that they get excited about.
[1] not hyperbole!
If it's your product, and it's a tech product, it might be appropriate for "Show HN". If you do, though, the tone should be "hey, you might find this interesting", rather than a sales job.
If the product solves a problem, you might find a Reddit sub about the problem.
Beyond that... I don't know.