Full Answer

The guiding principle is to spend server-side effort where event loss is most expensive. A dropped page view barely moves anything; a dropped purchase corrupts ROAS, starves the bidding algorithm of its most important signal, and makes profitable campaigns look like failures. So the priority order follows value and intent, not completeness for its own sake.

The core set for a WooCommerce store is CompletePayment as the anchor, with InitiateCheckout and AddToCart capturing the steps where intent sharpens, and ViewContent feeding retargeting audiences. PlaceAnOrder is useful where order placement and payment are distinct in your flow. Each should be sent server-side from the corresponding WooCommerce hook so the event reflects something your store actually processed rather than something a browser was allowed to report.

There's a quality dimension beyond the event name. Server-side events let you attach value, currency, contents, and hashed customer data consistently, which is what makes them strong training signal for TikTok's optimisation. Keep event names mapped to TikTok's standard set, send a shared event_id so the server and Pixel deduplicate, and resist firing everything server-side just because you can, a focused set of accurate, well-valued high-value events consistently outperforms a noisy stream of low-value ones, and it keeps your reporting honest as well.