Podcasts continue to grow in the U.S. (and globally). Heading into 2023 there are more than 5 million podcasts with over 70 million episodes available. The U.S. is the largest market with 100 million active listeners, up from 82 million in 2021. With a desirable target audience for marketers, the U.S. podcast ad dollars are projected to increase from $1.4 billion in 2021 to $4 billion by 2024.
https://www.forbes.com/sites/bradadgate/2023/01/25/2022-was-another-record-year-for-podcasts/