Add a responsive viewport meta tag
Google indexes mobile-first and most visitors are on phones. No viewport tag means the page renders zoomed-out and unusable on mobile — a direct ranking and conversion hit.
How to fix
Add the standard viewport meta. Do not disable user scaling (user-scalable=no / maximum-scale=1) — that is also a WCAG accessibility failure.
<meta name="viewport" content="width=device-width, initial-scale=1">
Detected automatically by the SEOlvl SEO Health audit (check viewport). Run a free audit or see the full issue library.