The YouTube Partner Program (YPP) allows content creators to earn money from their videos on YouTube. To join, creators must meet specific eligibility requirements, including having at least 1,000 subscribers and 4,000 watch hours in the past year. Once accepted, they can monetize their content through ads, channel memberships, and merchandise shelf features. Participants in the YPP can access various tools and resources to help grow their channels and improve their content. The program also provides creators with insights into their audience and performance, enabling them to make informed decisions about their video strategies and engagement.