Apple Music doesn't host podcasts, but Apple Podcasts does. Here are some of the most popular and highly-rated podcasts on Apple Podcasts:

1. "The Daily" - This podcast by The New York Times provides a fresh perspective on the major stories of our time.

2. "Serial" - This podcast tells a true story over the course of a season.

3. "The Joe Rogan Experience" - Comedian Joe Rogan explores all things ranging from all things ranging from comedians, MMA fighters, psychedelic experiences, and more.

4. "Radiolab" - This podcast explores scientific and philosophical questions.

5. "StartUp Podcast" - This podcast is a series about what it's really like to start a business.

6. "How I Built This" - This podcast is about innovators, entrepreneurs, and the stories behind the movements they built.

7. "The Michelle Obama Podcast" - The former First Lady dives deep into conversations with loved ones—family, friends, and colleagues—on the relationships in our lives that make us who we are.

8. "Crime Junkie" - If you can never get enough true crime, this podcast is for you.

Remember, the "best" podcast can vary greatly depending on your personal interests, so it's worth exploring different categories and shows to find what you like the most.