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What is Google’s mobile first indexing?
Google’s mobile-first indexing means that Google primarily uses the mobile version of a website when deciding how to crawl, index, and rank its pages, even when the search is performed on a desktop. This reflects the shift in user behavior: the majority of web searches now originate from mobile devices, and Google’s indexing approach aligns with how most people actually access the web.
For practical purposes, this means the mobile version of a site is the version that determines how it ranks in search results. If a site’s mobile version is missing content that appears on desktop, loads significantly slower on mobile connections, or delivers a poor user experience on small screens, those deficiencies directly affect its rankings. A site that looks strong on desktop but underperforms on mobile will be disadvantaged in search regardless of the quality of its desktop experience.
Sites with separate desktop and mobile versions should ensure both contain the same content and structured data, since Google evaluates the mobile version for indexing purposes. For most new sites, a responsive design that adapts a single codebase to all screen sizes is the clearest way to ensure consistent indexing and ranking performance across devices.









