It's beneficial for the company because it receives both advertising and sales leads that it wouldn't necessarily be able to access otherwise. It's also beneficial for you and their other affiliate publishers, who are able to make money from sales without actually having to get involved in handling the transaction. Since all you're doing is essentially connecting people with products, affiliate marketing can be one of the most time- and cost-effective methods to make money online. (See also: 5 Ways to Make Passive Income Online)
When beginning your affiliate marketing career, you’ll want to cultivate an audience that has very specific interests. This allows you to tailor your affiliate campaigns to that niche, increasing the likelihood that you’ll convert. By establishing yourself as an expert in one area instead of promoting a large array of products, you’ll be able to market to the people most likely to buy the product.
Affiliate marketing is often touted as a "get rich quick scheme" by shady sites offering pyramid schemes that promise quick cash for little effort. Make no mistake—successful affiliate marketers like Pat Flynn of Smart Passive Income put in a lot of effort toward building an audience and creating quality content that will bring in sustainable passive income. Expect to do a lot of legwork up front—but if you play your cards right, you can build a solid source of revenue over time.