iTunes, or now “Apple Podcasts” says:
Siri can help listeners find and subscribe to your show in Apple Podcasts, so spread the word on your website, in your newsletter, and wherever else you communicate with your audience. For example, to find your show, encourage them to say things like:

• “Play [The Great Shalom].”
• “Play my newest podcasts.”
• “Play the first episode of [Great Shalom].”

Listeners can also ask Siri for information about the podcast that is currently playing and request to be subscribed. For example:

• “What podcast is this?”
• “Subscribe to this show.”