Apple has never published how the charts are built, and anybody who tells you they know the formula is selling something. What can be observed, across a lot of shows over a lot of weeks, is narrower than a formula but more useful than a guess.

Recency beats volume. A show with four thousand downloads last week outranks a show with forty thousand spread over two years. The charts are a measure of what is happening now, not of what a catalogue has accumulated, which is why a dormant show with a large back catalogue slides steadily down while a new one climbs past it.

Both listens and downloads count, and they are not the same event. A download is the file being fetched. A listen is somebody actually playing it, and Apple can see how far they got. A thousand downloads that are never played is a pattern, and it is a pattern that looks exactly like a show buying downloads, because it usually is.

Completion matters more than it used to. If most people stop in the first two minutes, that is a signal about the show that no amount of traffic corrects. Traffic can bring people to an episode. It cannot make the episode hold them.

Category depth is the practical lever. Ranking in Technology means competing with every large technology show on the platform. Ranking in a narrower subcategory is a different contest with a different field, and a show that charts anywhere gets browsed by people who were not looking for it, which is the compounding part.

New followers are worth more than any single week's downloads, because a follower is the next episode's download arriving without being asked. A campaign that produces listens and no follows has produced a spike. One that produces follows has moved the show's baseline.

What this means in practice: pace matters. Delivery that arrives evenly over days reads as a show being discovered. The same volume delivered in an afternoon reads as a show being inflated, and Apple has had a long time to learn the difference between the two shapes.