Client-side tracking runs in the user's browser or app and captures what happens in the interface, such as page views, scrolling, clicks, and screen views. Server-side tracking sends events from your backend, so it is the most reliable option against ad blockers and browser privacy restrictions, and it still works in a first-party context. Snowplow supports both, with client-side trackers for web, iOS, Android, React Native, Flutter, and more, and server-side trackers for Node.js, Python, Java, Go, .NET, and other languages. Events from every tracker go to the same Collector and land in the same events table. A third option, CDN tracking, records requests at the edge, including those from AI agents that don't run JavaScript.
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