In 2025, website performance is no longer a technical side quest—it is the growth strategy. This article explains why Interaction to Next Paint (INP) has replaced First Input Delay and why it now sits at the center of UX, SEO, and CRO. Learn how poor interaction responsiveness directly increases bounce rates, erodes trust, and suppresses rankings in Google. The guide breaks down how INP measures real user experience, not lab metrics, and why optimizing it delivers faster engagement, higher dwell time, and stronger conversions across every user journey.
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