The Hidden Value of Assist Channels: Why Your 'Low ROAS' Campaigns Might Be Winners

That 'low ROAS' campaign might be your best performer. In the relentless pursuit of high Return on Ad Spend (ROAS), many marketing teams fall into the trap of over-optimizing for the last click. This narrow focus leads to the premature culling of valuable "assist channels"—the campaigns that don't close the deal but are essential in guiding the customer toward conversion.

It’s time to look beyond the last click and discover how these seemingly "low ROAS" campaigns drive conversions without getting the credit they deserve, and more importantly, how to value them properly.

Why the Last-Click Model is Costing You Money

The default attribution model in most ad platforms is the last-click attribution model. This model assigns 100% of the conversion credit to the final marketing touchpoint a customer interacted with before making a purchase. While simple and easy to track, this approach is fundamentally flawed in a multi-touch, multi-device world.

The Problem with Last-Click:

It ignores the journey: Modern customer journeys are complex, involving multiple touchpoints across different channels—from a social media ad to a blog post, a search ad, and finally, an email. Last-click only sees the finish line.
It undervalues top-of-funnel efforts: Channels like display advertising, content marketing, and non-brand paid search often serve as crucial introductions or educational steps. Under a last-click model, these channels appear to have a low or even zero ROAS, leading to budget cuts.
It creates a self-fulfilling prophecy: By only optimizing for last-click, you starve the channels that feed your bottom-of-funnel campaigns, ultimately leading to an overall decline in new customer acquisition.

What is an Assist Channel, and Why Does it Matter?

An assist channel is any marketing touchpoint that influences a conversion but is not the final click. Think of them as the point guards of your marketing team—they set up the shot, even if they don't take it.

Consider a typical e-commerce journey:

Awareness (Assist): A customer sees a display ad on a news site (low ROAS, high impression count).
Consideration (Assist): The customer later searches for a related problem and clicks on a non-brand search ad leading to a blog post.
Decision (Closer): A week later, the customer searches for the brand name and clicks on a brand search ad to purchase.

In this scenario, the brand search ad gets all the credit. The display ad and the non-brand search ad, which were critical in initiating and nurturing the journey, are labeled as "low ROAS" and are at risk of being paused.

How Can You Properly Value Your Assist Channels?

The solution lies in moving beyond simplistic last-click reporting and adopting a more holistic multi-touch attribution strategy. This involves using models that distribute credit across all touchpoints in the customer journey.

1. Adopt a Multi-Touch Attribution Model

Instead of last-click, consider these more equitable models:

Attribution Model	How Credit is Distributed	Best For
Linear	Equal credit to every touchpoint.	Understanding all channels' contribution.
Time Decay	More credit to touchpoints closer to the conversion.	Shorter sales cycles where recent interactions are more influential.
U-Shaped/Position-Based	40% to first interaction, 40% to last, 20% split among middle interactions.	Balanced view of both awareness and closing efforts.

By applying a model like Position-Based, you immediately see the value of your top-of-funnel assist channels, which are now correctly credited for initiating the journey.

2. Measure Incremental Value, Not Just ROAS

The true test of an assist channel is its incrementality. Does the channel drive conversions that would not have happened otherwise?

Case Study: The Incremental Power of YouTube

A direct-to-consumer brand noticed their YouTube campaigns had a reported ROAS of 0.8, which was below their target of 2.0. They decided to run an incrementality test by pausing the campaigns in a specific geographic region (the control group) while keeping them running in another (the test group).

Observation: The control group (paused YouTube) saw a 15% drop in all conversions, including those attributed to brand search and direct traffic.
Conclusion: The YouTube campaign, despite its "low ROAS" of 0.8, was actually driving significant incremental demand that was being closed by other channels. Its true value was far higher than its reported ROAS.

This is why you need a tool to reconcile your reported ROAS with the actual value generated. You can use a dedicated tool like the Customer Journey Value Calculator to model and quantify the true impact of your assist channels.

3. Link Your ROAS to Your Customer Journey

To truly understand the hidden value, you must map your campaigns to the stages of the customer journey:

Journey Stage	Typical Assist Channels	Key Metric to Track
Awareness	Display, Social Video, Podcasts	Impressions, Video Views, New Users
Consideration	Non-Brand Search, Blog Content, Webinars	Time on Site, Pages per Session, Micro-Conversions
Decision	Brand Search, Retargeting, Email	Last-Click Conversions, ROAS

If your display campaign (Awareness) has a low ROAS but is driving a high volume of new users who then convert via a brand search campaign (Decision), the display campaign is a winner. It's an assist channel with high Customer Journey Value.

Actionable Takeaways for Marketing Leaders

Don't let a flawed metric dictate your budget. Here are three steps you can take today to uncover the hidden value in your assist channels:

Challenge Your Default Attribution: Implement a Position-Based or Time Decay model in your analytics platform. Compare the results to your last-click data to see which channels are being undervalued.
Run Incrementality Tests: Use geo-testing or holdout groups to measure the true, incremental impact of your lowest-performing channels. You might be surprised by the results.
Educate Your Stakeholders: Use data from your multi-touch models to explain to finance and leadership that a "low ROAS" is often a sign of a successful assist channel, not a failing one.

Ready to Uncover the True Value of Your Marketing Spend?

Stop leaving money on the table by cutting campaigns that are secretly driving your growth. It's time to reconcile your reported ROAS with the actual value your campaigns are generating across the entire customer journey.

1. Calculate Your True Customer Journey Value Use our free Customer Journey Value Calculator to model different attribution scenarios and quantify the hidden contribution of your assist channels.

2. Embed the Calculator on Your Site Want to provide this valuable insight to your own customers or internal teams? Learn how to embed this calculator on your website to drive engagement and demonstrate thought leadership.

3. Deepen Your Attribution Knowledge For more insights on how to optimize your budget and measure complex marketing efforts, read our related articles:

Don't let the last click be the last word on your marketing budget. Invest in the full journey.