If an ID is called that no longer exists (a common issue in old systems), instead of a broken PHP error, the "Smart-Seal" displays a custom, AI-driven "Suggested Content" page based on the closest valid ID or metadata.
Security professionals use Google Dorks to find these patterns across the web. Common dorks include: inurl:index.php?id= : Finds pages using the id parameter. inurl indexphpid patched