I've hired mentors to listen to me rant for a few hours. They ask questions, and they are surprised by my sales figures. Their advice is always the same: stop writing features NOW, and start learning who/why your customers are buying from you, and use that data to find more of them.
My absolute instincts are to show off the product/features and let the customer make a decision if it's a fit. But every marketer says, "no, don't describe the feature, tell the user why it'll help and save them time."
And my response is, "if I have to tell them that, and they believe me, then I'm not sure I want them as a customer..." Everything is subtle on a good day, but feels weirdly deceiving on a bad day. I feel like I don't trust marketing - so I don't want to write marketing that I think doesn't work on me. It's like tickling yourself.
I've been trying to rectify this by building out a new "Feature Tour" part of my app's website. This will give me space for some light documentation, links to Guides/FAQs, but also be composable into landing pages for specific niches and calls to action. We'll see if it works, but still a few weeks from launch.