What is Mid-Roll Ad?
A mid-roll ad is an advertisement placed in the middle of a podcast episode, typically during a natural break in the content. These ads usually command the highest CPM rates because listeners are most engaged at this point.
Why Mid-Roll Ad Matters for Podcasters
Mid-roll ads are the gold standard of podcast advertising because they appear when listeners are most engaged with your content. Unlike pre-roll ads that some listeners might skip, or post-roll ads that many never reach, mid-roll ads catch listeners at peak attention. This engagement translates to higher CPMs, typically ranging from $20-$40 depending on your show's category and audience. Mid-roll ads are usually placed at natural transition points—between segments, after a major topic discussion, or during a planned break. The best practice is to place them around the 25-50% mark of your episode, when listeners are invested but not yet thinking about moving on. Many successful podcasters use mid-rolls as their primary revenue source, sometimes running multiple mid-roll ads in longer episodes. The key is maintaining listener trust by keeping ads relevant and not overwhelming your content with too many interruptions.
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CPM (Cost Per Mille)
CPM stands for Cost Per Mille, which means cost per thousand downloads. It is the rate advertisers pay for every 1,000 downloads of your podcast episode.
Pre-Roll Ad
A pre-roll ad is an advertisement that plays at the very beginning of a podcast episode, before the main content starts. These ads typically last 15-60 seconds and are the first thing listeners hear.
Post-Roll Ad
A post-roll ad is an advertisement that plays at the end of a podcast episode, after the main content has concluded. These ads typically have lower CPM rates because not all listeners reach the end of episodes.
Dynamic Ad Insertion (DAI)
Dynamic Ad Insertion (DAI) is a technology that allows podcast hosts to insert different advertisements into episodes after they've been published, without re-editing the audio file. This enables targeted, up-to-date ads that can be changed over time.