Full Answer

GTM provides two categories of value: tag management and browser event capture. Tag management — coordinating which scripts load, when they fire, and what data they send — becomes unnecessary when server-side tracking delivers events directly to destination APIs. There are no tags to manage because there are no browser-side tags.

Browser event capture is the genuine tradeoff. GTM's built-in triggers can detect scroll depth milestones, YouTube video play percentage, element visibility, and custom click events — all interactions that happen in the browser's DOM without any corresponding WooCommerce PHP hook. If your marketing team uses these engagement signals for content optimisation, audience building, or campaign segmentation, losing GTM means losing that data stream.

For ecommerce conversion tracking — the primary use case for WooCommerce stores — GTM adds overhead without adding data. The purchase event, the add-to-cart event, and the begin-checkout event all have corresponding WooCommerce hooks that fire server-side with richer data than GTM's Data Layer typically provides. Server-side events include complete billing information, full product details, and accurate order totals — data that GTM's browser-side capture often misses due to redirect timing, script loading order, or ad blocker interference.

The practical approach for most WooCommerce stores is server-side tracking for conversion events and a minimal GTM container — or a lightweight JavaScript snippet — for the specific engagement events that marketing requires. This keeps GTM's scope small, reduces its performance impact, and eliminates the complex server container infrastructure entirely.