옴니채널 속성 및 최적화

Design an omnichannel advertising attribution and optimization system for [companyName]. Address: 1) Cross-device and cross-platform tracking setup, 2) Attribution modeling approaches (data-driven, multi-touch, algorithmic), 3) Customer journey mapping across ad touchpoints, 4) Incrementality testing methodology, 5) Media mix modeling for budget optimization, 6) Channel interaction effects and assisted conversions, 7) Unified reporting dashboard combining all ad platforms, 8) Audience overlap analysis and frequency management, 9) Sequential messaging strategy across channels, 10) Budget reallocation framework based on performance. Show how to attribute value accurately, avoid double-counting, and optimize the ad mix to maximize efficiency in reaching [targetMarket] while working within [constraints]. Provide decision-making frameworks for campaign management.