Sauron + Google PageSpeed Insights for Shopify
Core Web Vitals for every product page — tracked over time, not just once.
What is Google PageSpeed Insights?
Google PageSpeed Insights (PSI) analyses web pages against Google's performance standards and Core Web Vitals thresholds. A score above 90 correlates with better rankings and conversion rates. Sauron integrates PSI to run automated performance audits across all your product and collection pages — not just your homepage — and tracks scores over time to catch regressions from app installations or theme changes.
How Sauron connects
No setup required. Sauron's Lighthouse worker calls the PSI API (or runs Lighthouse directly) for each page on a schedule. Results are stored per URL and displayed in your performance dashboard. Merchants on Starter and above get performance audits; Growth and above get alerts when scores drop more than 10 points.
How it works
5 steps from connection to SEO impact
Sauron's Lighthouse worker queues a performance audit for each product and collection URL in your store.
The PSI API (or headless Chromium for local Lighthouse runs) fetches and renders each page in mobile-simulated mode — matching Googlebot Smartphone's perspective.
LCP, CLS, FCP, TTFB, and overall Performance score are extracted and stored per URL with a timestamp.
Sauron compares the new score against the previous score. If Performance drops more than 10 points, an alert is created.
Performance trends are shown in your product dashboards — so you can see which pages improved or regressed after changes.
Key benefits
What you get from Google PageSpeed Insights
Audit every page, not just the homepage
Running PSI on your homepage is easy — any developer can do it. Sauron audits every product and collection page in your store, surfacing the specific pages with poor Core Web Vitals where rankings may be suppressed.
Track scores over time
A one-time PageSpeed score is a snapshot. Sauron tracks performance trends — so when you install a new app and scores drop 15 points, you'll know exactly when it happened and which pages were affected.
Mobile-first auditing
All Sauron performance audits run in mobile simulation mode — matching Googlebot Smartphone's perspective (the primary crawler since Google's mobile-first indexing shift). Desktop scores are misleading for SEO purposes.
Performance alerts
Set a performance score threshold and receive alerts when any page drops below it. Catch theme update regressions, new app performance impacts, and image optimisation opportunities before they affect rankings.
Features powered by this integration
Google PageSpeed Insights is available from Starter ($39/mo)
Upgrade to Starter or higher to unlock this integration.
Google PageSpeed Insights — FAQ
Does Sauron use the PageSpeed Insights API or Lighthouse directly? +
Sauron uses the Google PageSpeed Insights API for production audits. This is the same data source as running PSI at pagespeed.web.dev — providing accurate field data (CrUX) and lab data (Lighthouse) without requiring a browser.
How often are performance audits run? +
Performance audits run on a schedule based on your plan and store size. Core Web Vitals are checked weekly for all product and collection pages, with on-demand re-audits available after making performance improvements.
My PageSpeed score is 45. What should I do first? +
The most impactful improvements for Shopify stores are: (1) remove unused apps that add JavaScript, (2) ensure images have explicit width/height attributes, (3) use Shopify's built-in image CDN with WebP format, (4) defer non-critical third-party scripts. Sauron's audit highlights your specific issues by impact.
Does a better PageSpeed score guarantee better rankings? +
Core Web Vitals are a confirmed Google ranking factor — pages that fail CWV thresholds may rank lower than equivalent content that passes. However, content relevance and authority signals remain primary ranking factors. Think of page speed as the floor, not the ceiling.
Connect Google PageSpeed Insights today
Install Sauron from the Shopify App Store and connect Google PageSpeed Insights in minutes. Free trial on paid plans (14 days on Starter, 7 on Growth and Scale) — billed through Shopify, cancel any time.
Install on Shopify →