What is measured
The audit checks for meta name=viewport in the head of every sampled page.
Performance and mobile experience
Mobile viewport
This check finds the instruction that sets the correct page width on mobile devices.
Pass criterion
The template uses width=device-width and does not disable user zoom without a valid reason.
What to fix
Add one viewport declaration to the root layout and test real widths for horizontal overflow.
Automation limit
The tag does not prove responsive behaviour; layout, touch targets and wrapping still require browser testing.
Reference