To enable monetization for third-party domains on YouTube, you'll need to follow these steps:
Sign in to YouTube Studio: Use your Google account to sign in to YouTube Studio.
Navigate to Monetization Settings: Click on your profile picture in the top right corner, then select YouTube Studio. In the left menu, click on Monetization.
Enable Monetization: Click on Start under the Review Partner Program terms section and follow the instructions to apply for the YouTube Partner Program (YPP).
Complete the Application: Ensure that your channel meets the eligibility requirements, such as having at least 1,000 subscribers and 4,000 watch hours in the past 12 months. Complete the application process and connect a Google AdSense account2.