In an advertising landscape dominated by social media and search giants, podcasting remains both an emerging and paradoxical channel: it captivates audiences like few other formats, generates above-average returns on investment, yet remains largely underinvested.

Why is there such a gap between proven effectiveness and budgetary reality?

The answer lies as much in the measurement methods as in advertisers' still incomplete understanding of this medium.

How do you measure podcast performance?

Podcast advertising is no exception to the fundamental rules of marketing: what can’t be measured can’t be valued.

However, advertisers now have several tools at their disposal:

• Promotional codes and vanity URLs: simple, useful methods for tracking direct conversions, but limited to immediate actions.
• Multi-touch attribution: allows you to place the podcast within the consumer’s overall journey, taking into account exposure across multiple channels.
• Hybrid models (MMM): These more advanced models integrate audio into an omnichannel approach, which is useful for major brands.
• Brand awareness and recall studies: conducted by companies such as Nielsen and Signal Hill, among others, these studies measure the impact on brand perception, often extending far beyond a simple click.

It must be noted that while Facebook and Google Ads offer standardized dashboards, audio is still perceived as more of a DIY endeavor.

But tools are evolving rapidly and technology is advancing: dynamic ad insertion (DAI), real-time performance data, and specialized platforms are beginning to bridge this gap.

The Actual ROI of the Podcast

It’s a little-known fact: podcast advertising is one of the most effective forms of advertising available today.

• According to Acast, the average return on ad spend (ROAS) is 4.9. In other words, every dollar invested generates nearly five dollars in return. In some campaigns, that figure rises to over 6.
• Nielsen highlights significant increases in brand awareness (up 10 points on average), information seeking (up 7 points), and purchase intent (up 6 points) following advertising exposure.
• Unlike an intrusive ad or an ignored email, podcast listeners pay close attention. The voice, which is perceived as credible and familiar, helps build trust and encourages recommendations.

More and more compelling evidence

• Coca-Cola has incorporated audio into its omnichannel campaigns, combining podcasts and streaming to amplify their impact. The result: increased effectiveness in terms of brand recall and brand affinity.
• An Acast/OMD study conducted in Sweden showed a ROAS that was 34% higher than radio and 20% higher than social media.
• When it comes to niche podcasts, the impact is even more striking: an Audacy survey reveals that 94% of listeners to specialized podcasts took action after hearing an ad. Far from being part of an anonymous mass audience, the closeness of a small community becomes a strategic advantage here.

So why is there still so little investment in audio?

Despite these figures, audio still accounts for only a fraction of advertising budgets.

There are several reasons for this:

• Shopping habits: Advertisers are still focusing their budgets on “go-to” channels such as search, social media, and connected TV.
• The business model of agencies: Traditional agencies generate the bulk of their revenue from creating content for television and traditional media, which leads to a certain degree of conservatism…
• Lack of standardization: Unlike Silicon Valley platforms, the podcast ecosystem remains fragmented and lacks uniformity in its measurement tools.
• Perception of reach: Some advertisers view podcasting as a niche medium with limited reach.
• Perceived complexity —including fragmented inventories, a multitude of platforms, and a lack of knowledge—continues to hinder adoption.

The Podpass Solution: Quantitative and Comparable Reports

At Podpass, we know that the key to brand adoption lies in trust in the data.

That is why we have developed a clear campaign reporting format, designed to address the lack of standardization that continues to hold the market back.

Each campaign is the subject of a report structured around several metrics, including:

• Number of IAB-certified impressions: a recognized standard for measuring actual, comparable reach.
• Number of clicks: Accurate tracking of interactions generated by the campaign, thanks to trackable links.
• Promo code/vanity URL results: direct conversion metrics, useful for measuring short-term effectiveness.
• Detailed analysis by partner podcast: which show performed best, in terms of volume and engagement.

This format provides advertisers with a clear, data-driven, and comparable view of their campaigns' performance.

Exactly what the ecosystem has been missing until now.

Conclusion: An Opportunity to Seize

The podcast combines several rare strengths: high engagement, strong trust, and proven effectiveness.

Yet it remains the neglected stepchild of media plans.

This is a unique opportunity for brands to get in early on a channel that already delivers higher ROAS, stronger brand affinity, and greater brand recall—all while still being far from saturation.

If you'd like to learn more, please don't hesitate to contact us.