Podcast listening keeps making gains, and the medium is becoming a bigger part of marketers’ audio strategies.

Podcasts are expected to reach more than 500 million listeners worldwide by 2024. With this growth and innovations in podcast advertising in mind, many marketers now see the channel as essential to their media buying strategy.

We forecast that US podcast ad spending will surpass $2 billion next year and $3 billion by 2026. Podcasts will account for over a quarter of digital audio services ad spending in 2022 and will be more than a third of spending by the end of 2026.

Podcasting finds favor with brand advertisers: US ad spending on podcasts is growing at double-digit rates and will pass $2 billion in 2023.

Podcasts have Spotify seeing dollar signs. The company’s US podcast ad revenues will hit $191.9 million in 2022 and cross the $400 billion mark in 2024, with growth well into the double-digit percentages. The format will also make up an increasing share of Spotify’s overall ad revenues: 16.7% of its $1.15 billion in US ad revenues this year, before growing to 19.4% in 2024.

YouTube is the leading podcast platform among US adults who listen to 5 hours or more of these shows per week, with 55% tuning in there. Streaming audio platforms Spotify and Apple Podcasts take second and third place, respectively, while Amazon Music, iHeartRadio, and Facebook round out the top five.

Learn about the new Amazon Style store, podcasts on Twitter and LinkedIn, advertising at the NBA All-Star Game, who America’s truckers are, and more. Tune in to the discussion with our analysts Peter Vahle and Blake Droesch and director of forecasting Oscar Orozco.

On today's episode, we discuss Elon's pitch deck plans for Twitter, lululemon athletica betting on the future of connected fitness, how to best augment our reality, how fast online checkout should be, what kind of power video podcasts hold, an unpopular opinion about 15-minute grocery delivery, and where Nobel prizes come from. Tune in to the discussion with our analysts Evelyn Mitchell, Blake Droesch, and Paul Verna.

In 2021, more than three-quarters of the time that US adults spent listening to ad-supported audio went to AM/FM radio. Podcasts trailed way behind traditional radio, capturing just 11% of ad-supported listening, while Pandora, SiriusXM, and Spotify each accounted for less than 10%. AM/FM radio held a majority share across adult age groups and was the most listened-to ad-supported audio not only in the car (88%), but also in the home (72%) and workplace (68%).

BetterHelp bested other US podcast advertisers in 2021 and spent $76.9 million on podcast placements that year. This was nearly triple the outlays of NBCUniversal, the second-biggest spender, at $27.7 million. All told, the top 10 podcast advertisers invested close to $300 million.

On today's episode, we discuss Spotify's Q4 performance and what it tells us about how the audio streaming giant is changing. Then for "In Other News," we talk about what the biggest threat to Spotify's podcasting dominance will be and a new way to improve the accuracy of audio ads. Tune in to the discussion with our analyst Peter Vahle.

Spotify overtook Apple Podcasts as the biggest US podcast platform in 2021, when the Swedish company drew 28.3 million monthly US podcast listeners, about 200,000 more than its rival did. Come 2025, Spotify’s lead will widen to 13.2 million, while Apple’s growth in the sector will all but stagnate.