Practical uses
- Audit a site's performance before optimization work.
- Validate the impact of a redesign on Core Web Vitals.
- Check a competitor's site performance.
- Establish a baseline to begin performance tuning.
Pros and cons
What PageSpeed Insights does especially well — and the limits to anticipate.
Pros
- Completely free and no signup required.
- Combines real-world and lab data.
- Native Core Web Vitals integration with Google.
- Clear and actionable recommendations.
- API available for automated integration.
Cons
- No historical tracking or trend analysis.
- No alerts or continuous monitoring.
- No detailed per-session or per-user reports.
- Based on a single page load (no variation over time).
PageSpeed Insights: when it makes sense.
PageSpeed Insights excels for a quick, free audit; for continuous tracking and alerts, a tool like Datadog or New Relic is better.
Keep if
You want to quickly audit your site's performance.. You need a baseline on your Core Web Vitals.
Challenge if
You need continuous tracking (PSI is single-request).. You want integrated synthetic monitoring with alerts.
