It helps many affiliate marketers earn money by advertising to billions of Amazon shoppers. You can make money by sharing a link that leads to a sale and also referral fees from transactions.
Emails are a personal communication medium. It’s a great way to engage with people one-on-one and introduce the products you are promoting. It’s good to keep regular contact with your subscribers so start sending a monthly (or even weekly/fortnightly) email newsletter. One very effective way to attract subscribers is to offer something in exchange for their email.

Affiliate marketing gives you incredible flexibility to do what you want and still bring in revenue for your business. You don't have to create, produce, store, ship, or provide support for the product—you just sell it. That means you don't have set hours in which you need to be creating or promoting the product. You just choose products you like and that you think your audience will like, create the content to promote those products, and then do the actual promotion.
When a company or individual promotes someone else's products, they are participating in affiliate marketing. Affiliate marketing aims at generating revenue by promoting third-party products and services.