Affiliate Marketing is the process of promoting other people’s products. You set up a website or landing page and drive traffic to the links on that page. When someone purchases or opts-in for the product you receive a commission. There are numerous sites and programs out there for affiliates and based on your niche, you will need to decide which products you should promote.
There are some programs that will only accept you if you have a sizeable email list or social following; however, there are many that will accept you no matter the size of your following. You will need to sign up for the individual programs and then spend the time going through, picking out appropriate offers and generating the codes to put as links on your site.