"I have followed Michelle’s blog for years. Her blog posts are incredibly informative and never disappoint. Making Sense of Affiliate Marketing is no different. The detailed strategies she shares in her course can help any blogger implement affiliate marketing. Within two days I received my first ever affiliate sale! From then I was hooked. The Mastermind alone is worth the cost of the course and the immediate access to an affiliate marketing expert is priceless! I highly recommend Making Sense of Affiliate Marketing." - McKinzie Bean, Momsmakecents.com
The topic you choose must have enough depth that you can create a lot of content for it. This is important for building an authoritative site, for search engine optimization, and most importantly, for the end user. If you don't have enough content about a topic, you're not going to be taken very seriously as an authority on the topic and it's unlikely you can convince someone to make a purchase from you.
Affiliate marketing is also called "performance marketing", in reference to how sales employees are typically being compensated. Such employees are typically paid a commission for each sale they close, and sometimes are paid performance incentives for exceeding objectives. Affiliates are not employed by the advertiser whose products or services they promote, but the compensation models applied to affiliate marketing are very similar to the ones used for people in the advertisers' internal sales department.