One of the reasons that it's so successful is because the program is free and extremely simple to join. The interface is also easy to use. This means that you can start earning money right away once you've signed up. You earn money when a customer clicks on one of the links you're promoting and then buys something on the site. It doesn't even necessarily need to be the product you've recommended.
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.
Choose an affiliate program. First, you must decide which affiliate program to join. Affiliate programs often have a theme, such as gardening or weight loss, and you should find a theme that interests you. Look for a network with a lot of product codes that are relevant to your topic. Consider networks like Commission Junction, LinkShare, ShareaSale, Clickbank, and Amazon. Remember, it isn't really about the network – it's about whether the network is relevant to the content of your website.
Since the emergence of affiliate marketing, there has been little control over affiliate activity. Unscrupulous affiliates have used spam, false advertising, forced clicks (to get tracking cookies set on users' computers), adware, and other methods to drive traffic to their sponsors. Although many affiliate programs have terms of service that contain rules against spam, this marketing method has historically proven to attract abuse from spammers.
Always disclose your affiliate relationship. Most visitors will probably understand that graphic ads will lead to your getting paid, but if you write a review or use an in-text link as a recommendation, you want your readers to know that may lead to compensation as well. This ensures you retain transparency and trust with your readers, but also, it's required by the FTC's endorsement rules.