There are a few different ways to monetize a blog. You can sell advertising, sell sponsorships, or sell e-books.
Selling advertising can be a good way to make money if you have a large following. You can also sell sponsored posts, which means you get paid to promote a specific product or service.
E-books can be a good way to make money if you have a lot of information that you want to share. You can also sell subscriptions, which means people pay you to receive your blog posts every month.