Mobile-first indexing means that Google predominantly uses the mobile version of the content for indexing and ranking. Historically, the index primarily used the desktop version of a page’s content when evaluating the relevance of a page to a user’s query. However, since the majority of users now access Google Search via mobile devices, Google's indexing and ranking systems have adapted to reflect this trend.
Why Mobile-First Indexing?
The shift to mobile-first indexing is driven by user behavior. With more than half of global web traffic coming from mobile devices, Google aims to provide the best possible user experience. Mobile-first indexing ensures that users get results optimized for their devices, which are more likely to load faster and be easier to navigate.