Amazon Associates is an affiliate marketing program run by Amazon which allows you to sell its products on your own website in exchange for a cut of the profits. This enables you to boost your product range, test new types of products on your audience or even build a full business around this and perhaps other affiliate programs. For small businesses that currently sell products online, this could represent a great source of added revenue, if you sell additional products through Amazon, without worrying about getting the products yourself. Amazon conducts the sales and ships them directly to the client.
One of the cool things about Google AdSense is that it's so easy to get set up. If you have a blog or website, you can sign up for a free Google AdSense Account. From there, Google will give you a unique code that you will paste onto your website. Google takes it from there, tracking your page views, traffic, and earnings on your behalf. There is no upkeep or maintenance to get this thing going, which makes it a no-brainer if you have a website already.