# Attribuly vs GA4: From Engagement to True ROAS

GA4 tells you what happened on-site. Attribuly tells you which touchpoints drove revenue—then feeds cleaner purchase signals back to GA4.

## Different questions

GA4 helps explain on-site behavior. Attribution helps decide where to invest.

## Decision-ready ROAS

Reduce last-click distortion and get ROAS that supports budget moves.

## Close tracking gaps

Server-side purchase signals reduce gaps from blocked or dropped tags.

### Feed back to GA4

Enrich GA4 reporting with cleaner purchase/revenue signals (non-PII).

## They are not the same kind of report

Engagement is behavior insight. Attribution is a budget decision tool. Align the question before debating accuracy.

| Dimension              | GA4                             | Attribuly                         |
|-----------------------|--------------------------------|----------------------------------|
| Core question         | What happened on-site?        | Which touchpoints drove revenue?  |
| Inputs                | Client-side events, sessions, pages | Identity + orders/value + channels/touchpoints |
| Output                | Engagement & funnel insights   | Decision-ready ROAS (crediting)  |
| Best for              | Content, UX, on-site behavior analysis | Budget allocation & cross-channel decisions |
| Not for               | Assigning channel credit for ROAS decisions | Replacing GA4 behavior analytics |

## Explain the difference through ROAS

Align the question first, then the reporting differences make sense.

### Section 1: Why ROAS drifts (and still drives your budget)

- **Attribution breaks**: iOS limits, blockers, cross-domain hops, and dropped client tags can break Meta/Google measurement signals.
- **Last-click bias**: The final touchpoint gets over-credited while earlier demand creation is under-valued.

### Result: misallocated spend

You are making budget moves with ROAS, but the metric is often unstable due to gaps and bias.

### Section 2: What GA4 Engagement is for (and what it isn’t)

**Best for**  
- On-site behavior: pages, events, paths, content performance  
- Funnels: where users drop between steps

**Not for**  
- Answering “which channel deserves credit so I should increase budget”  
- Using engagement reports as a substitute for attribution

In one line: funnels explain what changed on-site; attribution explains who deserves credit for budget decisions.

### Section 3: How Attribuly makes ROAS closer to decision-ready

- **People (Identity)**: Connect touchpoints to outcomes with user_id / identity resolution.
- **Product (Order / Value)**: Align to orders and revenue; items/SKU can be an enhancement.
- **Channels**: Cross-channel crediting with deduplication for budget decisions.

The goal is not an “accuracy claim” but ROAS that is stable and usable for budget moves.

### Section 4: Feed key purchase signals back to GA4 (server-side)

When client-side tags are blocked or dropped, GA4 purchase/revenue can be incomplete. Attribuly uses server-side purchase signals to reduce the gap and can send cleaner conversion signals back to GA4, making reporting closer to reality.

### Note

This refers to non-PII purchase/value signals, not uploading emails or other personal data.

### Section 5: A common mistake: treating funnel as attribution

- **What you see**: GA4 engagement improves and the on-site path looks smoother.
- **What you need to answer**: Meta/Google attribution breaks plus last-click bias can distort channel crediting—leading to the wrong budget move.

### Conclusion

Use GA4 to improve on-site experience, and use Attribuly to credit channels and make ROAS-driven budget decisions. Together they are more reliable.

## FAQ

**Why isn’t GA4 Engagement an attribution report?**  
Engagement reports describe on-site behavior (what happened). Attribution helps decide budget allocation (who deserves credit). They answer different questions and use different inputs.

**Why does last-click distort ROAS decisions?**

**What does “decision-ready ROAS” mean?**

**What does Attribuly feed back to GA4?**

**When should I use GA4 vs Attribuly?**

## Make ROAS decision-ready

Use GA4 for on-site insight, Attribuly for cross-channel crediting and budget moves—and feed key server-side purchase signals back to GA4 to reduce gaps.