Understand and implement dynamic ad insertion (DAI) for podcasts

Verified steps

1. Understand the two DAI models: client-side insertion (the podcast app fetches ad audio separately and stitches it in the player) and server-side insertion (the hosting platform or ad server stitches the ad audio into the episode file at download time before sending it to the listener) — server-side is more common in podcasting because it works in any app without special player support
2. Mark ad break positions in your audio file when uploading to a DAI-capable hosting platform — ad markers define pre-roll, mid-roll (by time offset), and post-roll positions; the hosting platform's ad server fills these slots at request time based on listener signals
3. Integrate with a VAST-compatible ad server: VAST (Video Ad Serving Template) is the IAB standard used to describe ad content and delivery — podcast ad servers accept VAST tag URLs from advertisers and use them to fetch and stitch audio ad creatives into the episode at the marked positions
4. At request time, the hosting platform's ad server receives listener context (IP address, user agent, episode ID) and makes a real-time ad decision, selecting an ad creative from the configured VAST tags and stitching the audio into the response before delivery
5. Implement frequency capping and targeting at the ad server level — most enterprise DAI platforms allow targeting by geographic region, device type, and episode topic, and cap how many times a listener hears the same ad across a configurable time window
6. Measure downloads according to IAB Podcast Measurement guidelines to ensure ad impression counts are auditable — a download is counted only after a qualifying threshold of data transfer, not on the initial request