How to fix low performance score on Wix

Steps for Wix

1. Wix handles core infrastructure (CDN, compression, HTTP/2) automatically — your leverage is in content and design choices.
2. Images — In the Wix Editor, click each image → Settings → Optimize for web. Wix will auto-convert to WebP. Avoid uploading images wider than 2560 px; use 'Original' crop setting only when necessary.
3. Remove unused apps — Wix App Market → Manage Apps: delete any installed apps you no longer use; each adds script weight to every page.
4. Wix performance settings — Dashboard → Settings → Performance: enable 'Turbo' (available on some plans) which defers off-screen resources.
5. Video backgrounds — Replace video background sections on mobile with a static image (Editor → Mobile view → click the section → change background to image); video backgrounds are the single biggest LCP killer on Wix mobile.
6. Third-party scripts — Settings → Custom Code: audit every snippet added here. Remove tracking pixels, chat widgets, or pop-up scripts that are no longer needed or that load on every page unnecessarily.

<!-- Hero/LCP image: load eagerly with high priority, explicit dimensions -->
<img
  src="hero-banner.webp"
  alt="Summer collection — shop now"
  width="1200"
  height="600"
  loading="eager"
  fetchpriority="high"
/>

<!-- All below-fold images: lazy-load, explicit dimensions to prevent CLS -->
<img
  src="product-thumbnail.webp"
  alt="Blue running shoes"
  width="400"
  height="400"
  loading="lazy"
/>

<!-- Defer non-critical third-party scripts -->
<script src="https://example-chat-widget.com/widget.js" defer></script>

What is low performance score?

Lighthouse (the engine behind Google's PageSpeed Insights tool) grades every page from 0–100 on performance. The score rolls up several real-world loading metrics — most importantly Google's Core Web Vitals: Largest Contentful Paint (LCP, how fast the main content appears), Interaction to Next Paint (INP, how fast the page reacts to taps/clicks), and Cumulative Layout Shift (CLS, how much the layout jumps around). A score of 8/100 on mobile means the page is extremely slow for the majority of shoppers who visit on a phone. The score is not a vanity number — it reflects a genuine, measurable delay that real visitors experience.

Google uses page experience signals, including Core Web Vitals, as a ranking factor for mobile search — a store with a very low score can lose meaningful search visibility to faster competitors. Beyond rankings, conversion research consistently shows that every additional second of load time can reduce conversions by 10–20%; a score in single digits means customers are likely abandoning the page before it even finishes loading. Slow pages also penalize your Google Ads Quality Score, raising your cost-per-click. On mobile — where most ecommerce traffic now originates — the experience gap between a score of 8 and 80 is the difference between a bounce and a sale.

See the complete Low performance score guide for every platform and the full background.