Affiliate programs track conversions through affiliate links embedded in your content, using cookies to attribute sales or sign-ups to your referrals. However, cookie lifespan—the duration cookies remain valid—varies significantly between programs and affects how long you can earn commissions after a user clicks your link. For instance, some programs expire cookies at the end of a browsing session, while others, like Semrush’s, offer a cookie lifespan of up to 120 days. When choosing an affiliate program, consider cookie duration carefully, especially if your product’s purchase decision cycle is longer. Longer cookie lifespans increase the likelihood of earning commissions from delayed conversions, making your affiliate marketing efforts more rewarding. [Semrush]