The length of time that information is tracked by affiliate marketers when a customer clicks on an affiliate link and buys something can vary depending on the affiliate program and the tracking method used.
Some affiliate programs use cookies to track customer activity, which typically last for a set period of time, often 30 to 90 days. During this time, if the customer clicks on the affiliate's link and makes a purchase, the affiliate will be credited with the sale.
Other affiliate programs use unique tracking links, which can last indefinitely. With this method, the affiliate will receive credit for any sale made by the customer, regardless of when it occurs, as long as the customer uses the same device and browser to make the purchase.
It's important to note that some customers may clear their cookies or use different devices and browsers, which can make tracking more difficult. In these cases, the affiliate may not receive credit for the sale.
Ultimately, the length of time that information is tracked by affiliate marketers depends on the specific program and tracking method used, as well as the customer's behavior. To maximize the chances of being credited for a sale, it's important to choose a reputable affiliate program with reliable tracking methods, and to continually monitor and optimize your promotions.