Illustrative store performance review showing images, scripts and loading on a laptop.

Speed Optimization

$1,425.00
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ZAGO's Speed Optimization finds what is slowing your Shopify store down and improves the theme code, images and app setup within an agreed scope. Advanced adds Google PageSpeed Insights optimization and a Core Web Vitals assessment.

Who it's for: Shopify merchants whose store feels slow to browse or buy from, and who want before-and-after measurements on agreed pages rather than a promised score.

A slow Shopify store can make browsing and buying harder. We investigate what is slowing your store down, then improve the theme code, images and app setup within the agreed scope. Use this scoped performance work within your ongoing Shopify development and optimization plan.

Standard optimization

For stores that need a review of loading performance and practical improvements to the existing theme.

  • Review images and use lazy loading where appropriate.
  • Review CSS and JavaScript, including minification where it is useful.
  • Check app scripts and identify unnecessary code or loading overhead.
  • Review preloading, loading errors and slow requests.
  • Provide a report explaining the work and the before-and-after findings.

Advanced optimization

Includes the standard work, plus a deeper investigation of performance issues, Google PageSpeed Insights optimization and a Core Web Vitals assessment.

Select Standard Optimization or Advance Optimization above to see the current package price in your selected currency.

How we measure improvement

We compare the same agreed pages before and after the work, using consistent mobile and desktop test settings. The report separates PageSpeed Insights lab results from real-user Core Web Vitals data, where that data is available.

Scores can vary between tests. Your theme, required apps, tracking scripts, content and third-party services all affect performance. We agree realistic targets after reviewing the store; we do not promise a fixed score or a particular increase in sales or search rankings.

Scope and delivery

We confirm the pages, planned changes and delivery schedule before work starts. We check the affected shopping flows before release. Any proposed app removal or change to tracking needs your approval.

A redesign, new functionality, paid app or theme licences, and work outside the agreed scope are quoted separately. Shopify's hosting and third-party app services are outside our direct control.

Not sure which package fits? Send us your store URL and tell us where customers are experiencing slow loading.

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Frequently asked questions

We review images, CSS, JavaScript, app scripts, preloading and slow or failing requests within the agreed scope. Advanced optimization adds deeper performance diagnosis, PageSpeed Insights work and a Core Web Vitals assessment.
Select a package on this page to see the current price in your selected currency. Standard and Advanced have different scopes. We confirm the work before starting; additional features, licences or work outside the agreed scope are quoted separately.
No fixed PageSpeed score is promised. We agree realistic targets after reviewing your store and compare the same pages using consistent mobile and desktop test settings. Your theme, required apps, content and third-party services affect the result.
Lab scores help diagnose problems, but they are not the same as customers' real experience. We separate lab results from real-user Core Web Vitals data where available and explain the test conditions.
We identify apps that cost you speed and tell you what each one is costing. Whether an app goes is your call.
A report showing what was changed, with before and after measurements.
Standard reviews loading performance and makes practical improvements to your existing theme: images, CSS and JavaScript, app scripts, preloading, loading errors and slow requests, with a report. Advanced includes all of that plus a deeper investigation of performance issues, Google PageSpeed Insights optimization and a Core Web Vitals assessment.
No. The aim is a store that is quicker to browse and buy from. We compare the same pages before and after and separate lab scores from real-user Core Web Vitals data where available. We do not promise a particular increase in sales or rankings.
Yes, within the agreed scope. We review loading errors and slow or failing requests, and Advanced adds a deeper investigation of performance issues. Shopify's hosting and third-party app services are outside our direct control.