What we learned after migrating a client from a Legacy Platform to Shopify and growing their online revenue by R347,000
Gaia Quinn
Technical SEO
The Shift to Online Shopping Has Changed Everything
It was not that long ago that South African consumers made the bulk of their purchasing decisions in-store. Retail shelves, promotions and face-to-face service drove sales. But the current shopping landscape has shifted, the growth of mobile internet access and changing consumer habits have collectively pushed shopping behaviour firmly into the digital space.
Today, a consumer's purchasing journey begins the moment they pick up their phone. They research, compare, browse and buy, often without ever setting foot in a physical store. For e-commerce businesses, this represents an enormous opportunity. But with opportunity comes competition. Every second your site takes to load is a second your competitor has to steal that sale.
This is not theoretical, we experienced it firsthand with one of our clients. By addressing the underlying technical issues slowing their online store, we unlocked real, measurable revenue growth.
When we moved our client from a slow, legacy platform to a modern, optimised storefront, we did not just improve their website, we fundamentally changed how their advertising budget performed.
Page Speed Is Not a Nice-to-Have; It Is a Revenue Driver
There is a statistic that every e-commerce business owner needs to commit to memory: most users will abandon a website that does not load within 2 seconds. Do not slow down their scrolling - leave. Entirely. And they will go to a competitor.
Google has publicly stated that for every additional second of mobile page load time, conversion rates can drop significantly. The data support this. Bounce rates increase, session durations fall, and the likelihood of completing a purchase plummets as load times creep upwards.
We observed this exact pattern in our client's Google Ads data. Users were actively engaging with the ads, click-through rates were healthy, and interest was there. But they were failing to convert. When we investigated data, the story became clear: slow page load times were creating friction at the most critical point of the purchasing journey. The customer arrived at the store, waited, and left.
"Our data revealed that although users were actively seeing and engaging with our Google Ads, many struggled to complete their purchases due to slow page load times."
This is the cruel irony of slow site speed in performance marketing: you pay to acquire a visitor, the ad works, the user clicks, and then your website hands the sale to your competitor, for free.
Modern Platforms Like Shopify Are Built for Speed - Legacy Platforms Are Not
Not all e-commerce platforms are created equal. The difference between a platform built for today's web and one that was designed a decade ago is the difference between winning and losing sales at scale.
Shopify and other modern platforms like it have made page speed a core part of their infrastructure. Their global content delivery networks (CDNs), image optimisation pipelines, lightweight theme structures and app ecosystem are all designed with performance in mind. Updates happen automatically, security patches are applied in the background, and merchants benefit from improvements made at the platform level without lifting a finger.
What Modern Platforms Do Automatically:
Serve images in next-generation formats (WebP, AVIF)
Leverage global CDN infrastructure for faster delivery
Apply lazy loading so only visible content loads first
Use optimised, lightweight theme code
Auto-minify JavaScript and CSS
Provide built-in mobile-first design standards
Contrast this with legacy platforms, while they remain powerful and highly customisable tools in the right hands, many businesses running older platforms are sitting on a growing pile of technical debt. Outdated codebases, unoptimised custom plugins, excessive third-party extensions and server configurations that have not kept pace with modern web standards all contribute to a site that simply cannot keep up.
Shopify removes much of this complexity. The platform handles the infrastructure so you can focus on running your business, not managing your server.
The Main Culprits of Slow Page Speed - and What the Data Showed
It is worth understanding the common technical factors that cause slow page speed. These are the issues that accumulate over time, often unnoticed, while quietly costing you revenue every day.
Common Causes of Slow Page Speed:
Unoptimised images: oversized files that take forever to download
Render-blocking JavaScript and CSS: code that prevents the page from displaying
Excessive HTTP requests: too many files to load before the page appears
Outdated or bloated plugins: unnecessary code adding weight to every page
Poor server response time: a slow backend before the browser even starts loading
Lack of caching: the same data is fetched from scratch on every visit
No CDN: content served from a single distant server instead of globally
When we audited our client's legacy store, we found evidence of many of these issues - compounded by years of accumulated content, custom extensions and a site architecture that had not been reviewed in some time.
Metric | Before (Legacy Platform) | After (Shopify) |
|---|---|---|
Mobile LCP | 11.3 seconds | 1.4 seconds |
Desktop LCP | 7.3 seconds | 1.5 seconds |
Site Health Score | 62 / 100 | 74 / 100 |
Total Site Issues | 239,000 issues | -16,000 issues |
Pages Crawled | 10,000 pages | 1,469 pages |
LCP - or Largest Contentful Paint - measures how long it takes for the main visible content of a page to load. It is one of Google's Core Web Vitals, a set of metrics that directly influences both user experience and search engine rankings. Research suggests that the ideal LCP is under 2.5 seconds. Our client was sitting at more than four times that threshold.
After migrating to Shopify, the mobile LCP dropped from 11.3 seconds to 1.4 seconds - a reduction of nearly 10 seconds. Desktop LCP fell from 7.3 seconds to 1.5 seconds, allowing customers to seamlessly purchase on their store.
A Cleaner, Leaner Site
The overall Site Health score improved from 62 to 74 out of 100, indicating far fewer technical problems across the pages analysed. This improvement spanned errors, warnings and notices across the board. What this tells us is that the new platform delivered not just a faster site, but a cleaner and more technically sound one. Fewer broken links, fewer redundant pages, fewer errors for search engines and browsers to navigate around. A leaner site is easier to crawl, easier to index and easier to maintain.
The Bottom Line: Technical Performance Is Business Performance
Following the website migration to Shopify and the significant improvements in page speed, we recorded a marked performance uplift across every meaningful business metric: higher conversion rates, lower acquisition costs, and a substantial increase in overall revenue. They directly and materially affect your marketing return on investment, your customer acquisition costs, and your top-line revenue.
If your e-commerce store is running on a slow, outdated platform, you are not just losing rankings - you are losing sales. Every day. To competitors who have invested in faster, better infrastructure.
The good news? The path forward is well-trodden. Modern platforms, better hosting, optimised code and a thoughtful migration strategy can take a store from the brink of digital irrelevance to a high-performing revenue engine.
