Email marketing is a type of online marketing that involves sending emails to potential and current customers to promote products or services, build relationships, and drive sales. Here are some ways you can use email marketing to make income:

1. Sell products or services: You can use email marketing to promote and sell your own products or services to your email list. This can include physical or digital products, such as ebooks or online courses.
2. Affiliate marketing: You can use email marketing to promote products or services from other companies as an affiliate and earn a commission on any sales made through your referral.
3. Sponsored content: You can also use email marketing to promote sponsored content or sponsored products to your email list. This can be a good way to earn income from companies that want to reach your audience.
4. Subscription-based model: Another option is to use email marketing to drive sign-ups for a subscription-based service or product. This can be a good way to generate recurring income.

To get started with email marketing, you will need to build an email list by collecting email addresses from people who are interested in your products or services. You can do this through opt-in forms on your website, social media, or through other marketing efforts. Once you have a list of email addresses, you can use email marketing software to create and send emails to your list. It’s important to follow best practices for email marketing, such as obtaining permission from recipients before sending emails and providing an easy way for people to unsubscribe.