SEO & GEO
What is Mobile-First Indexing?
Definition
Google's approach of using the mobile version of your website as the primary version for crawling, indexing, and ranking — meaning your mobile experience determines your search rankings everywhere.
In more detail
Mobile-first indexing means Google predominantly uses the mobile version of your website's content for indexing and ranking. If your desktop site has content or links that your mobile site does not, Google may not see them at all. This has been the default for all websites since 2023.
This matters because many websites are still designed desktop-first and then adapted for mobile — sometimes losing content, navigation, or structured data in the process. If your mobile site has fewer internal links, missing schema markup, or hidden content behind expandable sections, your rankings suffer across all devices.
To check how Google sees your mobile site, use the URL Inspection tool in Google Search Console and select the mobile crawler. Test your site on actual mobile devices, not just by resizing your browser window — real mobile performance includes network speed, touch targets, and viewport rendering.
Why it matters
If your mobile experience is broken, slow, or missing content compared to desktop, your search rankings suffer everywhere — even on desktop searches. Mobile-first indexing means your mobile site IS your site as far as Google is concerned.
Further reading
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