Mobile viewport checker
The viewport meta is how you tell phones not to pretend they are a 980-pixel desktop. Missing it hurts usability and is a cheap mobile-ranking own-goal.
What we measure
We look for <meta name="viewport">. Present is a pass; absent is a warning. We do not parse every token — the usual miss is the tag not being there at all.
The line that works
Add <meta name="viewport" content="width=device-width, initial-scale=1"> as early as you can in <head>. Avoid user-scalable=no unless you have a very specific app-like reason: it blocks pinch-zoom.
See the full audit in your workspace