Cookie stuffing involves placing an affiliate tracking cookie on a website visitor's computer without their knowledge, which will then generate revenue for the person doing the cookie stuffing. This not only generates fraudulent affiliate sales but also has the potential to overwrite other affiliates' cookies, essentially stealing their legitimately earned commissions.
Kevin Edwards, Global Client Strategy Director of AWIN, put it this way: “Data will continue to underpin the channel’s success. When one of the world’s most important marketers bemoans the state of digital marketing as opaque and lacking transparency, it sends a clear signal about the opportunity for affiliate marketing. P&G’s chief marketing officer made that statement earlier in 2017 and it should be a lightbulb moment for us about positioning the channel as the foremost, results-driven opportunity available to digital marketers. This can only be achieved if we get better at sharing significantly more data to facilitate a more three-dimensional and qualitative view of affiliate marketing beyond last click. Lifetime value holds the key to building a more rounded view of the power of affiliates to deliver quality customers.”
Websites consisting mostly of affiliate links have previously held a negative reputation for underdelivering quality content. In 2005 there were active changes made by Google, where certain websites were labeled as "thin affiliates". Such websites were either removed from Google's index or were relocated within the results page (i.e., moved from the top-most results to a lower position). To avoid this categorization, affiliate marketer webmasters must create quality content on their websites that distinguishes their work from the work of spammers or banner farms, which only contain links leading to merchant sites.