Multi-Touch Attribution for CTV Campaigns

How multi-touch attribution works for CTV. Understanding the customer journey across channels.

Dec 2, 2025

5 min read

Last-click attribution gives CTV zero credit. Multi-touch attribution reveals CTV's actual contribution. Understanding attribution models is essential for measuring CTV accurately.

The Last-Click Problem

CTV Exposure

Customer sees your CTV ad while streaming their favorite show.

Brand Search

Days later, customer searches your firm name on Google.

Click & Convert

Customer clicks your Google ad and fills out the form.

Wrong Credit

Under last-click: Google Ads gets 100%, CTV gets 0%.

This is obviously wrong. CTV drove the search. But last-click can't see that.

How Multi-Touch Attribution Works

Multi-touch models distribute credit across touchpoints:

Model	How Credit Is Assigned
Last-click	100% to final touchpoint
First-click	100% to first touchpoint
Linear	Equal credit to all touchpoints
Time-decay	More credit to recent touchpoints
Position-based	40% first, 40% last, 20% middle
Data-driven	Algorithmic based on actual conversion patterns

Linear Attribution Example

Journey: CTV → Organic search → Paid search → Conversion

CTV: 33.3%
Organic: 33.3%
Paid search: 33.3%

Position-Based Example

Same journey:

CTV: 40% (first touch)
Organic: 20% (middle)
Paid search: 40% (last touch)

Time-Decay Example

CTV: 15% (earliest)
Organic: 25%
Paid search: 60% (most recent)

Why Multi-Touch Matters for CTV

CTV is almost always an upper-funnel touchpoint. It creates awareness that other channels capture. Under last-click:

CTV looks like it generates zero leads
Budget gets cut
Performance actually declines (because CTV was driving search)

With multi-touch attribution:

CTV's contribution is visible
Budget decisions are informed
System optimization becomes possible

CTV accounted for 38% of impressions but 63% of conversions when proper attribution was applied.

Choosing an Attribution Model

✅ Recommended

Position-based: 40% first, 40% last, 20% middle

Data-driven: Algorithmic based on patterns

Linear: Equal credit to all touchpoints

❌ Avoid

Last-click: Gives CTV zero credit

First-click: Over-credits CTV, under-credits conversion

Any model ignoring upper-funnel

Position-based gives appropriate credit to CTV as the awareness driver while still crediting conversion channels.

Implementing Multi-Touch Attribution

Option 1: Platform-Native

Many CTV platforms include attribution:

MNTN tracks verified visits through conversion
Tatari provides multi-touch models
Some integrate with GA4

Option 2: Third-Party Attribution

Dedicated attribution platforms:

Rockerbox
Measured
Northbeam
Triple Whale

These aggregate data across channels for unified attribution.

Option 3: GA4 Attribution

Google Analytics 4 offers:

Data-driven attribution (default)
Multiple model comparison
Cross-channel visibility

Requires proper UTM tagging and integration.

Attribution Windows for CTV

How long should CTV get credit?

Scenario	Recommended Window
Direct response	7-14 days
Consideration purchase	14-21 days
Legal services	14-30 days
High-value services	21-30 days

PI legal services are consideration purchases. Someone sees your ad, has an accident weeks later, then searches for you. Attribution windows need to capture this.

Cross-Device Attribution

CTV plays on TVs. Conversions happen on phones and computers.

The challenge:

Ad seen on living room TV
Search happens on phone
Form filled on laptop
How do you connect them?

Solutions:

Household-level matching (same IP)
Device graphs (probabilistic matching)
Login-based matching (deterministic)

Platform match rates of 90%+ make cross-device attribution increasingly reliable.

Reading Attribution Reports

Key Metrics to Track

Assisted conversions: Conversions where CTV was in the path but not the last touch

Conversion paths: Common journeys (CTV → Search → Conversion)

Attribution credit by channel: How credit distributes across your mix

Model comparison: How credit shifts between models

What Good Looks Like

Metric	Healthy Sign
CTV assisted conversions	Growing with spend
CTV → branded search paths	Common pattern
CTV attribution credit	15-30% of conversions
Model variance	CTV credit higher in position-based than last-click