The signals that seem to carry weight are the concrete, verifiable ones: named authors with real credentials, author and organization schema, consistent facts across your site and third-party mentions, original data or first-hand experience, and citations from other credible sites. Vague trust badges or generic ‘About Us’ copy do very little on their own.
Because AI assistants often cross-check claims against multiple sources before surfacing them, inconsistency — different numbers or claims on different pages — quietly hurts you more in the AI era than it did in classic SEO, where a single page could rank on its own merits.