https://techcrunch.com/2020/01/08/spotify-brings-streaming-ad-insertion-technology-to-podcasts/

2019 was a breakout year for Spotify’s podcasting efforts, and now the company is turning up the dial on its ability to monetize this popular form of audio programming. Today, at the Consumer Electronics Show in Las Vegas, Spotify is announcing Streaming Ad Insertion (SAI), its new, proprietary podcast ad technology for Spotify Podcast Ads.

The technology makes key data — like actual ad impressions, frequency, reach, plus anonymized age, gender and device type — available to podcasters and advertisers for the first time.