1* Affiliate Marketing:
Affiliate marketing involves promoting another business's products or services in exchange for a commission on each sale. This is an effective way to generate passive income through a website or blog. You can find affiliate programs for a variety of products or services, from insurance, web hosting, e-books, etc.
2* Ad Posting:
Ad posting is a great way to make money from your website. You can place ads on your website and get paid for each click or impression. This is a great way to generate short-term income, but keep in mind that advertising revenue depends on the amount of traffic your website receives.
3* Creation of Online Courses:
You can create online courses on topics that you master. These courses can be of short duration or longer lessons. This is a great way to generate recurring income from your knowledge and experience. Online courses can be sold through platforms like Udemy, Coursera, and others.
If you want to know more (recommendations of each), let me know in the comment box.