Does website performance affect SEO?

Yes, but performance is one of many signals, not a substitute for relevant, useful content. Google's Core Web Vitals measure real-world loading performance with Largest Contentful Paint (LCP), responsiveness with Interaction to Next Paint (INP), and visual stability with Cumulative Layout Shift (CLS). Strong performance can improve the visitor experience and support search visibility, while relevance and content quality still matter. Review Google's Core Web Vitals guidance for the current metrics and recommendations.