Some things I've found helpful (I run a niche search engine and curation platform): 1) Find niche subreddits where people that are your target audience hang out, observe communities, help people out, participate in the discussion, if someone has a problem that your product can solve, then help them out in the comments and see what their feedback is 2) Learn a bit of SEO - you don't need to be an expert to fix some lo…
Agreed on #1. Once youre a legitimate member of a subreddit, post a beta version of your site. If it actually provides value and is useful (and you are not shilling), people should love it. Here is an example: https://old.reddit.com/r/Denver/comments/qshpov/i_started_ma... 522 votes and 51 comments on a relatively small subreddit put it in near the top for a day or two. Idea validated.
My experience has been that reddit is great for validation. Traffic and kudos. Compliments and constructive critique. But almost no traffic from reddit resulted in people willing to sign up and pay money.
Now, admittedly, I sold my profitable side project a couple years back. Maybe the trends have changed - so I'm curious whether reddit users are now actually potential customers, or is it still just good for traffic?