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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...
