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You made 50 sales today but GA4 shows only 30. Facebook Ads reports zero conversions from morning campaigns. Your data isn't missing—it's delayed. Platform processing lag, timezone confusion, and API throttling create gaps between when events occur and when they appear in dashboards. Server-side tracking with BigQuery eliminates this problem by storing your authoritative data immediately, while platforms catch up on their own schedule. Platform Processing Delays GA4: 24-48 hours for complete data. Real-time reports show 30-60 minute delay. Historical reports backfill for days. Facebook Ads: 1-3 hour delay normal. Up to 24 hours for conversion attribution. Google Ads: 3-6 hour delay typical. Can extend to 24+ hours during high traffic. TikTok: 2-4 hour delay for Events API data. These aren't bugs—they're architectural. Platforms batch-process billions of events. Your 50 conversions compete with millions of other events in processing queue. Timezone Confusion Your WooCommerce store runs PST. GA4 configured for...