For diffuse, non-organized religious movements like contemporary Paganism, podcasting has been important as a means of building community and generating discussion. I wager Pagan podcasting is less influential now than it was twenty years ago, but back then, it was very influential for some of us who discovered these religious traditions in the aughts.
Druidcast was a major factor behind my decision to join OBOD instead of ADF or AODA. I'd been listening to it for years before I decided to formally join a Druid order some years ago. It wasn't the only factor, but you get a very good sense of what OBOD is all about by listening to the podcast. Their production value is always good - which couldn't be said of all the other Pagan podcasts - and it's basically the only one I listen to anymore. I've got a massive backlog of them though because I don't commute anymore so I have to specifically carve out time to listen to podcasts these days, which just generally doesn't happen. Ah, well.