User Agent Info power-up gives you an ability to add header to your server hits, and you can then access that information on your server container and use it for your reporting.
X-Device-Bot, X-Device-Mobile, X-Device-Os, X-Device-Browser, X-Device-Browser-Version, X-Device-Engine, X-Device-Engine-Version header is added in event data inside your server Google Tag Manager.
Please notice that this power-up is in Beta.
1. Server-side GTM with multiple domains
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You’ve probably noticed that data about your website users and conversions collected by different analytics tools might vary. Most of the time, you’ll see that the purchase number in Google Analytics is lower than in your CRM. Where this data discrepancy comes from, why is it happening, and how to fix it?Oct 6, 2020
In this article, I will describe how to set up a custom subdomain within your Google Tag Manager server container. The main advantage of a custom subdomain inside the Google Tag Manager Server container is that it helps to bypass Intelligent Tracking Preventions, AdBlockers and increases cookie lifetime for users browsing in Safari. Pixels will be loaded from your subdomain and run as the first-party.