GTM Data Layer Product List & Impression Tracking

Product list and impression tracking gives you visibility into how your category pages, search results, and product recommendations perform before a single click happens. GA4's view_item_list and select_item events track which products users see and which they click — data essential for product ranking optimisation and understanding which category page layouts drive the most clicks to product pages. We implement these events in your data layer using Intersection Observer for true viewability tracking.