Need Help Verifying Speed Optimization on Maintenance Website

Greetings everyone!

I’m new here and looking for guidance on website speed optimization. I recently faced some issues with the PageSpeed metrics. Currently, my store passes Core Web Vitals for both mobile and desktop.

However, some clients want visual proof of speed improvements, so I’ve already performed:

  • Image optimization

  • Removal of repetitive CSS

  • Unused apps cleanup

I’m hesitant to remove any scripts without fully understanding their use, as I don’t want to break functionality.

I would greatly appreciate help troubleshooting this more efficiently. Could someone review my website acasastore.com and suggest the key parameters I can improve to increase my speed scores:

  • Mobile: from ~46 → 60+

  • Desktop: from ~21 → 70+

I primarily use Google PageSpeed Insights for testing. Any guidance on safe optimizations and best practices would be extremely helpful.

Thank you in advance!

Hello,

Thank you for your suggestion — I really appreciate your input. I’ll prioritize this and work on it as soon as possible.

The reason for focusing on the score change is the client’s requirement. They are asking for a 70+ score on both mobile and desktop. As a developer, I understand that the website’s Core Web Vitals are already healthy and performing well organically. However, the client prefers measurable proof through PageSpeed Insights rather than Real User Monitoring (RUM).

To answer your question:

Most users access the website from mobile devices. However, the client primarily reviews it on desktop, so optimizing for both mobile and desktop is mandatory for me.

Also, the website currently does not use any third-party scripts in the head section — there are no external links affecting performance.

Thanks again for your guidance.

Thanks for your suggestion, Michael. I’ll review this and make sure the functionality is properly taken care of.

sure buddy, I’ll let you know!

Hi, @Adarsh1295
I took a look at your site acasastore.com using Google pageSpeed analysis https://pagespeed.web.dev/analysis/https-www-acasastore-com/fe6lkgdksd?form_factor=mobile Even though your Core Web Vitals are passing, some scripts, images, and styles are still affecting load speed.

With a few adjustments, you can improve both mobile and desktop performance.

  1. Faster Images - Resize hero and product images for each device, use WebP or AVIF, and load offscreen images only when needed.

< img src=" /assets/product-hero.webp" loading=“lazy” alt=" Product Image">

  1. Delay Non-Essential JS - Let critical content appear first; defer widgets, popups, or tracking scripts:
  1. Streamline Styles and Apps - Inline key CSS for above-the-fold content and limit scripts from unused apps.

  2. Front-Load Important Content - Preload banners and main products so the first visible content appears faster:

These steps should help improve mobile and desktop performance sroce without affecting store functionality.

If you continue to notice slower performance after these adjustments, a third party Shopify optimization app that can help with that extra layer of improvement.

Sharing for Transparency , I’m affiliated with one called Website Speedy ( Website Speedy ). It’s an optional solution that some site owners use to help with optimization .

Hope this helps !

Thank you so much for taking the time to review my site and share such detailed suggestions. I really appreciate the effort and insights.

I’m currently implementing your recommendations — optimizing images, deferring non-essential scripts, and streamlining styles — and working on improving the store accordingly.

Thanks again for the helpful guidance!