Online stores today operate in an environment where user data is lost faster than ever before. Browsers restrict cookies, ad blockers block scripts, and users are increasingly sensitive to privacy. All this means that traditional browser-based tracking no longer provides a realistic picture of what is happening on the website.
Therefore, server side tracking is increasingly used, which not only changes the way of measurement but also affects the speed of the site and the stability of the data we use for marketing.
Why server side tracking changes the entire measurement picture
In traditional tracking, all data is collected in the user's browser. This means that every interaction – from viewing a product to making a purchase – has to go through JavaScript, which is often blocked or slowed down.
Server side tracking moves this step to the server. The browser no longer communicates directly with all advertising systems but sends the data first to your server, where it is processed and only then forwarded.
In practice, this means that much less data is lost, as browser blocks no longer have the same impact. At the same time, the load on the site is reduced because part of the scripts is moved from the user's browser to the server.
How it is used in real online stores
In practice, server side tracking is most often set up by creating a separate server "container" that receives data from the online store. Google Tag Manager is still used on the site, but only as an interface that forwards the data.
For online stores on the Magento platform, this is especially useful because it is possible to very accurately track events such as adding to cart, starting checkout, or purchase. The difference is that this data is now significantly more reliable because it no longer relies solely on browser performance.
Google Cloud or Stape – two real implementation paths
When a company decides on server side tracking, the question of infrastructure usually arises.
One option is a complete setup via the Google Cloud environment and a server container in Google Tag Manager. This approach gives the most control but requires more technical knowledge and maintenance.
The other, much more practical option for most online stores, is to use the Stape platform, which already prepares the entire infrastructure and allows for quick setup without complex configurations.
Practical example - Magento server side tracking
In one of the Magento online stores, we implemented server side tracking with a clear goal: to improve data accuracy while reducing the impact of scripts on page speed.
We separated the entire tracking into a server container and a web container in Google Tag Manager. Events such as product view, add to cart, and purchase are now first processed on the server and only then sent to analytics and advertising systems.
For stability and speed, we set everything up on a separate subdomain served via Cloudflare. This allowed the system to operate as part of the same domain, reducing data loss and improving reliability.
Additionally, a custom loader was added to reduce the impact of ad blockers, meaning that even in cases where users block tracking scripts, the data is largely preserved.
Result visible in page speed
After implementation, page loading improved by about one second, which is very noticeable on mobile devices. The optimization also affected the PageSpeed score, reaching around 90/100 on mobile devices.
More importantly, the impact on data was significant. Conversions became more consistent, differences between advertising platforms decreased, and it became clear that significantly fewer purchases were lost.
Backend tracking or server side tracking?
It often seems sufficient to send data directly from the backend system, for example, upon order confirmation. This is very accurate but only captures final events.
Server side tracking works more broadly. It captures not only the purchase but also all the intermediate steps of the user, from the first click to conversion. This allows for a much better understanding of the user journey and more effective ad optimization.
For this reason, Google advisors recommend it today, as it represents a balance between the accuracy of backend data and the breadth of user behavior data.
Why it will become a standard for online stores
Online stores no longer need just "some tracking," but tracking they can trust. If the data is not accurate, decisions about ads and sales are also wrong.
Server side tracking has practically become one of the few solutions that simultaneously improves page speed, reduces data loss, and enables more stable analytics in a world where traditional tracking is increasingly limited.
