When you launch your podcast, the aim is rarely to make money, but it may become possible over time for various reasons; you may want to buy stuff to improve your sound, get money for investing so much time in your podcast, or even just make money out of something you like.
Patreon is a crowdfunding platform which is interesting for creators in two ways: they can make money from their creations, and also create a more solid bond with a part of their community. If you have a podcast, take the time to explore this option!