Demonstrate working knowledge of Meta Conversions API (CAPI), Meta Pixel, TikTok Pixel/Events API, Google Ads conversion tracking, Google Enhanced Conversions, GA4, and Google Tag Manager (GTM) . Analyze and optimize against key business metrics, including CPI, CPA, CAC, ROAS, incremental ROAS, LTV, AOV, D7/D30 retention, repeat behavior, churn, CAC payback, and contribution margin .