Avoid commodity products that your readers can buy anywhere — the commissions are so small you won’t make worthwhile money unless you can drive tremendous traffic to your site.
The idea behind it is that you promote other people’s products, often through an affiliate network, earning a commission if people actually end up buying thanks to your marketing.

There are many people who claim the golden age of affiliate marketing is over. People said that in 2005, as well as 2008. Then 2010, 2012, and pretty much during every single change in Google’s algorithm or major affiliate’s commission structure. People are still starting brand new websites that are making four, five, or even six figures or more a month within the past couple years. In other words, even true beginners should ignore the static and get started.
There are also more advanced methods based on the email used or IP address – but we won’t get into those here, we’ll stick to the Here’s How to Start Affiliate Marketing on Your Blog in 8 Steps: Step 1: Create a Website or A Blog Step 2: Choose an Industry, and then Niche Down Step 3: Research Products in Your Niche that You Can Review Step 4: Sign Up for the Amazon Affiliate Program Step 5: Find affiliate programs for the other products you want to review Step 6: Create content in the form of tutorials, review posts, resource pages or emails and use your affiliate link Step 7: Optimize the page and track your rankings in Google Step 8: Rinse and Repeat!