Theme does not adapt properly to small screen sizes or mobile browsers.
Broken Layout on Mobile Devices
Key Points: Elements overflow, stack incorrectly, or break completely on smartphones and tablets.
You preview your site on a phone — and it’s a disaster. Texts overlap, images bleed off-screen, and navigation vanishes. Your theme might look great on desktop, but mobile tells another story.
📱 Why It Happens
- Theme lacks responsive design or media queries
- Fixed widths or heights set in CSS
- Plugins adding inline styles that ignore mobile behavior
🛠️ How to Fix
- Use browser DevTools to simulate smaller screens and find the breakpoints
- Add custom CSS with media queries to fix specific layout issues
- Switch to a modern, mobile-first theme if issues are structural
💡 Bonus
Google prioritizes mobile usability in SEO rankings — mobile testing is not optional.