SEO

Mobile-First Indexing

Definition

What is Mobile-First Indexing?

Google's policy of using the mobile version of a page as the primary version for ranking and indexing. In effect for all new domains since 2023. Sites must serve full content on mobile, not stripped versions.

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Cross-linked concepts

Core Web Vitals

Google's three performance metrics: LCP (Largest Contentful Paint), INP (Interaction to Next Paint), CLS (Cumulative Layout Shift). Direct ranking factor. Targets: LCP under 2.5s, INP under 200ms, CLS under 0.1.

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