Google primarily uses the mobile version of your site for indexing and ranking. Content, links, and structured data that exist only on the desktop version are not indexed.
This was a quiet but enormous shift. Sites with reduced mobile content (collapsed accordions of important text, hidden images, missing schema on mobile templates) lost meaningful organic visibility through 2023-2025 as the algorithm finished migration. The fix is straightforward: feature-parity between mobile and desktop renders.
The CWV thresholds are the same on mobile and desktop, but mobile field data is almost always worse — slower CPUs, slower networks, smaller viewports. Google primarily uses mobile CWV for ranking.
Mobile-specific INP optimization is the highest-leverage 2026 work for most sites. Most INP regressions come from third-party scripts (chat widgets, A/B test tools) that hammer mobile main threads. Audit, defer, and remove ruthlessly.
Google removed the AMP requirement for Top Stories carousel in June 2021, and by 2024 AMP traffic had collapsed across most publishers. The replacement is not a single technology — it is the combination of fast HTML, modern image formats, smart caching, and INP-aware scripting.
Sites still maintaining AMP versions in 2026 should sunset them. The maintenance overhead exceeds the diminishing traffic.
AI Overviews on mobile take meaningfully more vertical real estate than on desktop, often pushing classic blue-link results below the fold. The 'zero-click mobile search' rate is rising fast.
The strategic implication: optimize aggressively for being the source cited inside AI Overviews on mobile, and treat below-the-fold mobile rank as a secondary outcome. The brand cited inside the AI answer captures the user even when no click happens.
No — and you should migrate away if you still have one. Responsive design with feature parity is the only architecture Google fully supports in 2026.
No. AMP's traffic share has collapsed and the maintenance cost is not justified. Sunset existing AMP versions cleanly with proper redirects.
Use Chrome DevTools' device emulation for layout, the Mobile-Friendly Test tool for Google's view, PageSpeed Insights mobile tab for CWV, and a real $200 Android phone on a throttled connection for the truth.
Behaviourally, yes — mobile share is higher in markets with mobile-first internet adoption (India, Brazil, much of Southeast Asia). Technically, the same mobile-first indexing rules apply globally.