What is client-side tagging?

Within digital marketing, "client-side tagging" is a term that is appearing more and more frequently, mainly as the antithesis of server-side tagging. But what does it actually mean? And is client-side tagging really the right solution for tracking your visitors?
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Als je via client-side tagging data wil tracken, heb je op je website een web tag van je web container staan. Dit is de code van je Tag Management Systeem, zoals bijvoorbeeld Google Tag Manager, die je in de <head> en <body> van je website plaatst. Deze web tag code verzamelt bezoekersgegevens op jouw website op basis van je ingestelde tags en triggers en stuurt deze door naar een client. In het geval van client-side tagging is dit de browser van de gebruiker. Deze browser communiceert dan rechtstreeks met services zoals Google Ads, Google Analytics en Facebook.

So basically, this Web tag code replaces the pixels of analytics and marketing platforms. But the process of data collection and processing is still through the user's browser. You do have more control over which events and conversions you want to measure and to forward the same data to all platforms. The biggest advantage of client-side tagging is that you can load in HTML codes from your Tag Management System. So you no longer have to add these codes to your site's code, which ensures that your site will load faster and your performance will be improved.

In addition to client-side tagging, there is also server-side tagging. The distinction between these two approaches lies in where and how data is collected. In client-side tagging, data is collected through the visitor's browser. Server-side tagging, on the other hand, collects data on its own server. In the case of server-side tagging, the tracking data is sent directly from your server to the analytics platform. This provides more control over the data collected, more accurate measurements and increased privacy protection for visitors.

Client-side tagging vs server-side tagging

The previous paragraph tells us that server-side tagging will provide more accurate measurements than client-side tagging. This is because collecting data through the user's browser is Third Party Data, and the use of Third Party Data is being made increasingly difficult. EU regulations, Apple, Firefox and Google, among others, make it impossible for Web sites and Web shops to accurately track users. Using First Party Data will provide better measurements. First Party Data is data you collect and store yourself on your own server, and the main way to do that is through server-side tagging.

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What is server-side tagging?

Most common questions

Do I comply with the AVG with client-side tagging?
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