How to Attribute Shared Marketing Spend Across Channels When One Campaign Drives Sales on Multiple Platforms
When a single Meta campaign drives sales across Shopify, Shopee, Lazada and TikTok Shop simultaneously, assigning the full cost to one channel distorts every profitability decision you make. This guide walks through practical attribution models, incremental lift measurement and contribution margin recalculation so multi-channel operators can allocate shared marketing spend accurately and invest with confidence.