Full Answer

Seven events form the foundation of e-commerce tracking. These events power platform optimization algorithms (Facebook CAPI, Google Ads, TikTok), attribution models, and conversion analysis. Miss one, platforms can't optimize effectively. The Essential 7 Events 1. page_view: User lands on any page. Establishes session, enables retargeting pools. 2. view_item: User views product detail page. Signals purchase intent, enables dynamic product ads. 3. add_to_cart: User adds product to cart. High-intent signal, critical for cart abandonment tracking. 4. begin_checkout: User initiates checkout process. Platforms optimize for users who reach this point. 5. add_payment_info: User enters payment details. Final step before purchase, highest intent signal. 6. purchase: Transaction completes. Must include transaction_id, revenue, currency. This is what platforms optimize toward. 7. refund: Customer returns product. Negative signal that adjusts platform optimization and lifetime value calculations. These map to GA4 recommended events, Facebook/Meta standard events, Google Ads conversion actions, and TikTok Events API requirements. Implementing...