When describing products on my site, if the product has an affiliate program and I think the product is good, then I'll be referring you there using my affiliate link. This means I might be paid a commission if you buy the product I recommend. Then again I may not. It all depends on how the particular affiliate program works.
If you want to continue to see the content you get on this site, and if you want to do affiliate marketing on your own site, it will help you and me if you do decide to click my links and buy the products I love and use.