A few examples Google gave us include "Learn Something New," which includes podcasts like Stuff You Should Know and How To Do Everything, and "Laugh Out Loud," that features shows like Marc Maron's WTF and Chris Hardwick's The Nerdist. Beyond the station-based interface, you'll of course be able to subscribe to various podcasts to have them download automatically or send you notifications when they release new episodes. There's also a "top charts" section broken down by subject matter.
We haven't had a chance to try the new app yet, so it's hard to say how it'll compare to third-party options for podcasts on Android like Pocket Casts. But if you're already using Google Play Music (or someone who prefers sticking with one app for all your audio needs), this is a feature worth investigating. The station-based discovery feature is a somewhat unique take on podcasts and sounds like it'll be worth checking out when you want to find new shows. Unfortunately for iOS users, you'll have to wait -- Google says it's focusing on Android for now.