Mobile-first indexing
Google indexing and ranking based on the mobile version of your page rather than the desktop version. It has applied to all sites since 2023.
In depth
What it really means
Mobile-first indexing means the mobile rendering of your page is the version that gets indexed. If content, structured data or internal links exist only on desktop, Google does not see them.
It is settled rather than emerging, but the failure mode persists: responsive designs that hide content on small screens, and mobile templates that drop schema or navigation.
How it works
- Googlebot crawls with a smartphone user-agent.
- The mobile rendering is what gets indexed.
- Desktop-only content, markup or links are not indexed.
- Ranking is assessed from the mobile version.
Pros & cons
Pros
- A single responsive site satisfies it with no extra work.
- It aligns indexing with how most people actually browse.
- It surfaces genuine mobile usability problems.
Cons
- Content hidden on mobile becomes invisible to Google.
- Separate mobile sites are a maintenance and parity burden.
- Mobile performance issues carry more weight than before.
Common mistakes
- Hiding content on mobile for design reasons, which removes it from the index.
- Structured data present on desktop and missing from the mobile template.
- Reduced mobile navigation, which cuts internal links and stranded pages.
- Testing only on desktop.
Best practices
- Serve identical content on mobile and desktop.
- Keep structured data, headings and metadata the same across both.
- Preserve internal links in mobile navigation.
- Test with Search Console URL inspection using the smartphone crawler.
FAQs
What is mobile-first indexing?
Google indexing and ranking based on your page’s mobile version rather than the desktop one. It has applied to all sites since 2023.
Does content hidden on mobile still count?
Content collapsed behind an accordion still counts. Content removed entirely from the mobile version does not, because Google never sees it.
Do I need a separate mobile site?
No, and a responsive design is easier. Separate mobile sites create parity problems where content, markup or links diverge between versions.
Keep reading
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