After iOS 14, Facebook Pixel alone misses 30–40% of conversions. The fix is Conversions API (CAPI) - server-side tracking that sends data directly from your server to Facebook, bypassing ad blockers and privacy restrictions.
Pixel fires from the browser - blocked by iOS privacy, ad blockers, and cookie restrictions. CAPI fires from your server - nothing can block it. Together they give you redundant, accurate data.
Events Manager → Data Sources → Pixels → Create Pixel
Install via Google Tag Manager (recommended)
Set up events: PageView, ViewContent, AddToCart, InitiateCheckout, Purchase
Verify with Pixel Helper Chrome extension
Score above 7/10 = excellent. Below 5 = improve by passing hashed customer data (email, phone) with each event.
Set the same event_id in both Pixel and CAPI payloads - Facebook automatically removes duplicates.