There are several ways to earn money on YouTube:

1. Ad revenue: You can earn money from ads that are shown before, during, or after your videos. You will receive a share of the ad revenue based on the number of views your videos receive and the cost of the ads.
2. Sponsored content: You can also earn money by creating sponsored content for businesses or brands and posting it to your YouTube channel.
3. Selling products or services: You can use your YouTube channel to sell products or services directly to your audience.
4. Crowdfunding: You can use YouTube to promote a crowdfunding campaign and raise money for a specific project or cause.
5. Affiliate marketing: You can earn money by promoting products or services from other businesses and earning a commission on sales.

In order to be eligible to earn money on YouTube, you must be a part of the YouTube Partner Program and meet all of the program’s eligibility requirements. This includes having at least 1,000 subscribers and 4,000 hours of watch time within the past 12 months, and having an AdSense account linked to your YouTube account.