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What attribution models should I use for marketing?

attribution models explained last-click attribution data-driven attribution multi-touch attribution attribution model comparison

Quick Answer

No single model tells the full story -- use multiple simultaneously. First-touch attribution shows which channels drive discovery (good for brand awareness budgets). Last-touch shows what closes deals (good for bottom-funnel optimization). Position-based (U-shaped) gives 40% credit to first touch, 40% to last, 20% distributed across middle interactions -- a practical default for most ecommerce. Data-driven attribution uses machine learning on your historical data to assign credit based on actual impact, but requires significant conversion volume to be reliable. Start with position-based, compare against first/last-touch, and graduate to data-driven when you have enough data.

Full Answer

Attribution models determine how credit for conversions is distributed across marketing touchpoints. The right model depends on your customer journey complexity, sales cycle length, and whether you're optimizing campaigns or understanding business performance. The Five Main Attribution Models 1. Last-Click Attribution (GA4 Default) How it works: 100% credit goes to the last touchpoint before conversion (excluding direct traffic). Example journey:

  • Facebook ad → Google search → Direct visit → Purchase
  • Credit goes to: Google search (last non-direct click) Best for:
  • Direct-response campaigns
  • Short sales cycles (hours to days)
  • E-commerce with impulse purchases
  • Campaign optimization (platforms need to see conversions they directly drove) Limitations:
  • Ignores all earlier touchpoints
  • Undervalues awareness and consideration channels
  • Makes upper-funnel campaigns look ineffective 2. Data-Driven Attribution (Machine Learning) How it works: GA4's algorithm analyzes conversion vs non-conversion paths to assign credit based on actual contribution. Example: If...

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