Google Essentials Checker — screenshot of web.dev

Google Essentials Checker

This is Google's web.dev/measure tool, essentially PageSpeed Insights. It provides performance metrics and improvement suggestions for web pages. I use it to quickly gauge site health and identify critical optimization areas.

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Questions & Answers

What is Google PageSpeed Insights (web.dev/measure)?
Google PageSpeed Insights, hosted on web.dev/measure, is a web-based tool provided by Google that analyzes the performance and user experience of a web page. It evaluates a site against various metrics and offers actionable recommendations to improve its speed and overall quality.
Who should use the web.dev/measure tool?
This tool is intended for web developers, site owners, SEO specialists, and anyone concerned with website performance and user experience. It helps identify critical areas for optimization to ensure web pages load quickly and are accessible on all devices.
How does Google PageSpeed Insights compare to other website performance tools?
PageSpeed Insights is unique as it integrates Lighthouse analysis and provides both lab data (simulated environment) and field data (real user experience data via Chrome User Experience Report, CrUX) where available. This combination offers a comprehensive view of performance compared to tools that might focus solely on lab data.
When is the best time to use web.dev/measure for website analysis?
It should be used during development to identify performance bottlenecks early, and regularly after deployment to monitor ongoing performance. It's also valuable when troubleshooting performance regressions or before launching significant site updates.
What key metrics does PageSpeed Insights report?
PageSpeed Insights reports on Core Web Vitals, including Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and Interaction to Next Paint (INP), along with other metrics like First Contentful Paint (FCP) and Speed Index. These metrics are crucial for understanding user experience and search engine ranking.