How can I add SEO to a web app built onto Adalo so that it can easily be discovered online (google for example)
That’s not possible at the moment. I suggest building your web app with Adalo and your landing page/blog/etc with a platform that specializes in websites like Webflow, Duda, Wix, etc. Have a button that says “login” or “signup” on your website that then goes to a subdomain like app.website.com. You will have more control over SEO that way.