IAB Tech Lab released the final version 2.3 of its Podcast Technical Measurement Guidelines on September 29. The update followed a public comment period in which, according to the organization, no comments required changes to the document. The guidelines have also moved to GitHub for easier discovery and change management.
Version 2.3 clarifies that the guidelines apply to both audio and video podcast episodes distributed through open RSS feeds or podcast apps that rely on server-side file delivery. It replaces “listener” with “podcast consumer”. It also adds guidance on URL prefix measurement, RSS enclosure URL changes, invalid traffic, platform anti-fraud responsibilities and the different measurement windows used to count valid downloads.
Why it matters
Podcast ads are bought on download counts, and a download is not the same thing as a play. IAB Tech Lab says as much in its post: a download is not the same as a confirmed play, and an ad delivered through server-side measurement is not always the same as a client-confirmed ad exposure. Version 2.3 gives buyers and sellers one written definition to point to when their numbers differ.
The group is already planning version 3.0, with a public comment release planned for the middle of 2027. It is expected to move beyond downloads and take on client-confirmed playback, listen-through, ad completion, video podcasts, skip behavior and scrubbing.
Measurement standards are a recurring theme here. In Outdoor Ads Just Joined CTV’s Measurement Stack and AI Search Visibility Just Became Measurable we followed other channels getting shared measurement definitions.
The original insight
Version 3.0 is the one to prepare for, and the preparation is cheap. Video podcasts already send client-side playback signals that audio feeds mostly do not. If you buy podcast ads, ask each seller now which numbers they report as downloads and which as confirmed plays, and keep the two in separate columns of your reporting. When 3.0 defines client-confirmed playback, you will have a baseline to compare against instead of a single blended figure.
Source: IAB Tech Lab
