How to Track ROAS Across Multiple Channels

A framework for measuring paid-media return across Meta, Google, TikTok, YouTube, and other channels.

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Cross-channel ROAS requires a consistent numerator and denominator: attributed revenue divided by advertising cost. The difficult part is deciding which revenue belongs to which channel when journeys overlap.

A practical workflow

1. Choose the revenue source of truth.
2. Standardize campaign naming and UTMs.
3. Collect cost from each channel.
4. Define attribution windows and model.
5. Deduplicate conversions.
6. Compare attributed ROAS with blended business performance.

Use blended metrics and experiments as a guardrail against over-interpreting model-based credit.

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