Core Web Vitals Checklist to Speed Up Service Business Websites

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Service business websites often load slowly despite appearing simple, due to hero videos, tracking scripts, chat widgets, and oversized images affecting performance. Google's three Core Web Vitals — Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS) — provide a structured framework for diagnosing and fixing these issues. Developers are advised to use real-user field data from tools like Chrome UX Report and Search Console alongside lab tools like Lighthouse, rather than relying on a single Lighthouse score. Key fixes include avoiding lazy-loading of LCP images, breaking up long JavaScript tasks that delay interaction response, and reserving explicit space for media elements to prevent layout shifts. Third-party scripts such as analytics, chat, and ad pixels should only load based on consent and actual business need, not be placed indiscriminately in the document head.

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