Adding a star to an episode will prevent it from being automatically deleted according to your Auto Archiving settings. You can find this action in the player toolbar options which can be customized to include the four most used actions in the toolbar and the rest are only a tap away.
To add a star to the currently playing episode
- Tap the mini player
- In the full player screen tap the star icon ☆ from the toolbar (which can be customized)
To add a star to individual episode from podcast page or filter
- Tap the episode row
- Tap the star icon ☆ in the top right