With Google's mobile-first indexing making your mobile experience your only SEO experience as covered in our guide to mobile-first indexing, a comprehensive mobile experience audit is not optional — it is a prerequisite for competitive rankings. Yet most mobile audits focus only on technical scores while missing the real-world experience issues that cause users to leave and send negative signals to Google.
Technical Mobile Audit Checklist
Viewport configuration. Every page must have <meta name="viewport" content="width=device-width, initial-scale=1">. Without this, pages display at desktop width on mobile, making them impossible to use. Check in Google's Mobile-Friendly Test tool.
Text size. Body text must be at least 16px on mobile. Smaller text forces users to zoom in — a poor experience signal. Check your CSS for font-size declarations that may be too small on mobile viewports.
Tap target sizing. Buttons, links, and interactive elements must be at least 48x48 pixels with adequate spacing between them. Tap targets that are too small cause users to accidentally tap the wrong element — a poor interaction signal that contributes to high INP scores as covered in our guide to mobile Core Web Vitals.
Content width. No horizontal scrolling. Content must fit within the mobile viewport width without requiring horizontal scrolling. Fixed-width elements wider than the viewport cause this common problem.
Flash and incompatible content. Flash, Java applets, and other plugins not supported on mobile must be absent. Any form field that triggers the wrong keyboard type (using text input for a phone number field rather than the tel input type) creates friction.
User Experience Mobile Audit
Navigation usability. Can users navigate your site easily on a smartphone? Desktop navigation menus often break down on mobile — hamburger menus that do not work, dropdown menus that require hover interaction unavailable on touch screens.
Form usability. Contact forms and checkout forms on mobile require extra attention. Each field must have appropriate autocomplete attributes, correct input types, and visible labels. Multi-step forms should show progress clearly.
Image loading. As we covered in our guide to image SEO, images should use srcset to serve appropriately-sized versions to mobile devices. Our page speed tool identifies oversized images in mobile context.
Testing Your Mobile Experience
Use Google's Mobile-Friendly Test for technical checks, Google Search Console's Mobile Usability report for site-wide issues, and manual testing on actual devices — not just emulators. Real device testing catches issues that emulators miss, particularly around touch behaviour and real-world performance.
Summary
A complete mobile experience audit covers viewport configuration, text sizing, tap target sizing, horizontal scroll prevention, navigation usability, and form functionality. Use our speed tool for performance data, Search Console for site-wide mobile issues, and manual device testing for real-world experience gaps. Fix mobile issues before other optimisations — Google's mobile-first approach means mobile problems limit the impact of every other SEO investment.
Missed the previous article? Read: How to Build a Sustainable SEO Content Calendar for 2026