Speed improvements on mobile webpage

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1

Got a client ive worked with for over a year who wants his mobile SEO rating to improve. Fully willing to pay but wants actual results. Anyone replying here ill happily send forward.

His request:

Hi,
Our Wix site www.betterspeech.com ,
gets 22 on mobile on Google’s PageSpeech Insight https://pagespeed.web.dev/

We are looking for an expert SEO/JavaScript or Wix Velo developer that can optimize whatever can be possibly optimized on the site and its code to reduce the First Contentful Paint (FCP) from 3.6 seconds to under 2.2 seconds to help improve conversion and our SEO rankings.
If you are 100% sure you can achieve this task please reply.
Tx, Ranan

5

Hey,

Based on PageSpeed Insight the issue is clear: your low mobile score (-22) and FCP -3.6s are mainly caused by render-blocking JS, heavy above-the-fold content, and unused resources-which is typical for Wix under mobile throttling.

Here’s how to improve this :

1. Above-the-fold cleanup (highest impact)

  • Replace hero video/slider with static optimized image

2. Image optimization

  • Convert all hero + first viewport images ⇒ WebP

  • Serve smaller sizes for mobile (critical for FCP)

3. Delay non-critical JS (Velo)

$w.onReady(function () {

setTimeout(() => {

const script = document.createElement(“script”);

script.src = “https://example.com/script.js”;

script.defer = true;

document.body.appendChild(script);

}, 3000); });

4. Font + CSS control

  • Reduce font weights

  • Avoid heavy styling above the fold (render-blocking)

Focus on points 1 and 3 first - above the fold cleanup and JS deferral will give the biggest FCP gains toward your 2.2s target.

If you want to speed up implementation, tools like Website Speedy can help automate image optimization, script deferral on Wix. It’s completely optional to use.

Disclaimer : I’m affiliated with the Website Speedy .

Hope this helps!