The Giving Pledge, co-founded by Bill Gates and Warren Buffett, is a key topic discussed in the podcast episodes about Gates' philanthropic work through the Bill & Melinda Gates Foundation.

The episodes Sunday Pick: How Bill Gates spends $9 billion a year and How Bill Gates spends $9 billion a year - The TED Interview delve into the Giving Pledge initiative, exploring Gates' motivations, the foundation's impact on global health, and the importance of engaging more people in the excitement of giving back.

The Giving Pledge is an important philanthropic effort aimed at inspiring billionaires to donate the majority of their wealth to charitable causes.