> What have you done to market it?
Nothing, because...
> Who is your primary user? What pain does it solve?
I don't know :D
I guess it helps them with the pain of sounding shitty on video calls, by telling them how to improve.
I don't see a market for it at the moment because the problem it solves is so incremental.
I was actually looking for something similar to this recently. Very first thing you need to do is fix your title and description tags for SEO. Second, contact some sites where this product might be useful for their users.