At a Glance: Affiliate marketing is a performance-based model where you promote products or services and earn a commission when someone buys (or completes an action) through your unique affiliate link. It’s a low-cost way to start earning online that can scale from side hustle to full-time income. In the United States alone, affiliate marketing spending is expected to reach $12 billion in 2025. So, whether you’re just getting interested in this industry or have already planned to become an affiliate marketer, you have likely made a good choice.  Thanks to its great income potential and growing popularity, affiliate...