How to fix cwv cls on Wix

Steps for Wix

1. Images: In the Wix Editor, click any image → Settings → ensure 'Fit' or 'Fill' mode is set and the image container has a fixed height. Wix renders its own image component with reserved space, but if you've set container height to 'auto' it can collapse before the image loads — set an explicit pixel height on the container.
2. Strips / sections: For each section strip, go to the strip settings and set a fixed minimum height rather than 'fit to content', especially for sections containing images or embeds.
3. Cookie banner: In Settings → Cookie Banner, choose 'bottom' position so it appears as an overlay, not a top push-down that shifts content.
4. Wix Chat / bookings widget: These are rendered by Wix natively with reserved space. If using a custom HTML embed (Add → Embed Code → HTML iframe), set an explicit height on the iframe element in the embed settings panel.
5. Fonts: Wix manages font loading internally; you cannot add font-display descriptors directly. Use Wix's built-in font choices (available in the Text settings panel) rather than custom uploaded fonts to minimise FOUT-related shifts.
6. Verify: Use Wix's built-in SEO tool (Marketing & SEO → SEO Tools → SEO Assistant) and cross-check with PageSpeed Insights; target CLS < 0.1.

What is cwv cls?

Cumulative Layout Shift (CLS) measures how much page content unexpectedly moves around while a visitor is looking at it. Every time an image pops in and shoves text down, a banner slides in from a cookie notice, or a font swap causes a paragraph to reflow, that counts as a layout shift. Google adds all those shifts together into a single score; anything above 0.1 is considered "needs improvement," and above 0.25 is "poor." A score of 1.35 (like the example above) means the page is shifting dramatically — visitors are misclicking, losing their place, and bouncing before they buy.

CLS is one of Google's three Core Web Vitals and is a direct ranking signal in Google Search — a poor score actively suppresses your position in search results, reducing organic traffic and revenue. On mobile, where most ecommerce shopping happens, layout shifts are especially jarring: a customer tapping "Add to Cart" can accidentally tap a shifted link instead, killing the conversion. High CLS also signals a low-quality page experience, which increases bounce rate and reduces the trust visitors place in your store. Google's own data shows that sites meeting Core Web Vitals thresholds see measurably better business outcomes than those that don't.

See the complete Cwv cls guide for every platform and the full background.