Platforms that host podcasts store and send out your content. They also make sure that your site doesn't slow down or crash because of the large audio files, and they make your work easy to find.
After you upload your podcast to one of these hosts, listeners can hear it right away on your site through their web app. Podcast hosts also make it easy to share your audio with third-party streaming services like Apple Podcasts and Spotify.
Also, hosting platforms usually come with advanced tools like podcast analytics, automatic transcription, and ways to make money from a podcast. When starting a podcast, these add-ons can be very helpful.