What is Page Speed?
Definition
Page speed refers to how quickly a web page fully loads for a user. It's measured by multiple metrics including TTFB, FCP, LCP, and CLS. Google uses page speed as a direct ranking factor via the Core Web Vitals assessment and PageSpeed Insights score. Slow pages rank lower and convert less.
Why Page Speed matters for Shopify stores
Every 100ms improvement in load time correlates with a 1% increase in conversion rate in e-commerce (Deloitte study). Shopify stores that pass Core Web Vitals thresholds consistently outperform slow competitors in both rankings and sales. Shopify apps are the most common source of speed regressions.
Shopify example
A home decor store installs 12 Shopify apps over 18 months. Each adds JavaScript. Their mobile PageSpeed score drops from 78 to 41. Auditing and removing 4 unused apps brings the score back to 71 with no feature loss.
How Sauron handles Page Speed
Sauron runs PageSpeed Insights via Google's API for every product and collection page, tracking scores over time and alerting merchants when a score drops more than 10 points — often indicating a new app installation.
See Product SEO on Autopilot feature →Common mistakes
- ✕ Installing multiple apps that each add JavaScript to every page load
- ✕ Not setting explicit image dimensions, causing layout shifts that hurt CWV scores
- ✕ Keeping apps installed 'just in case' even when not actively used
- ✕ Testing on desktop only — mobile scores are often 30–40 points lower
Automate your Shopify SEO
Understanding Page Speed is step one. Sauron handles the implementation — automatically, for your entire Shopify store.