- Byline your content and include biographical information. "Lilouartz Smith is a supplement researcher in Anywhere, USA, focused on delivering top health-supplement information to blah blah blah" or whatever. Something along those lines. Google wants to see that you're some kind of authority and not some nameless faceless SEO hack or charlatan.
- If you have sources you can cite for anything (even if it's just a backlink to, like, a New York Times article relevant to some tangential point you're making), do so.
- Make sure your entires are dated and there's some kind of trackable update history in your content.
The only other thing I'll say: It's also possible that SGE is killing your site (i.e., the Google Gemini summaries). That's been happening with MANY sites for a while now; people aren't clicking through anymore on Google results because the AI search gives them a high-level overview in a sentence or two. There's not a lot you can do about that.
You could aggressively pursue an AIO strategy by posting regularly about your site and information in sources that AI loves to reference (Reddit, LinkedIn, Quora, etc.). But that won't get you site visitors necessarily; it will just maybe get you more citations in GenAI.