Mobile-first indexing means Google predominantly uses the mobile version of a website's content for indexing and ranking. This approach was implemented because most users now access Google Search with a mobile device.
Key implications of mobile-first indexing:
- The mobile version of your site becomes the primary version Google uses for ranking.
- Content not visible on mobile may not be indexed or considered for rankings.
- Mobile page speed is a more significant ranking factor.
- Mobile usability issues can impact your overall search performance.
Even if most of your traffic comes from desktop users, Google will still primarily use your mobile site for ranking determination.