Direct answer: Use first-touch attribution to understand where demand first became identifiable and last-touch attribution to understand which recorded interaction captured conversion. Report both for lead generation, preserve their definitions and use pipeline outcomes to prevent either lens from controlling budget alone.
Key takeaways
- First touch answers discovery; last touch answers conversion capture.
- Neither measures the complete journey or causality.
- Direct and untracked interactions need explicit rules.
- Dual reporting reveals channel roles more honestly.
How the models differ
First touch assigns all credit to the earliest eligible recorded source. Last touch assigns all credit to the final eligible source before conversion. Results change with identity and lookback rules.
When each model helps
- Use first touch for audience and discovery investment.
- Use last touch for landing pages, retargeting and conversion handoff.
- Use CRM cohorts to compare downstream quality by both lenses.
A practical example
A prospect may discover a guide through search, return through email and convert after a direct visit. First touch credits search; last non-direct may credit email; a strict last touch may credit direct. Each answers a different question.
Recommended report
Show first-touch leads, last-touch leads, qualified rate and revenue side by side, with the same cohort window. Add experiment evidence when making causal budget claims.
Experience, sources and limitations
This guide reflects GrowthSparx's practical work across acquisition, analytics, CRM and conversion operations. Platform interfaces and requirements change, so verify official documentation before implementation. The framework does not promise perfect attribution; it makes evidence, controls and uncertainty visible.