The "rel" attribute with the values "noreferrer noopener" is used in links to improve security and protect users' privacy. The "noreferrer" value tells the browser not to send the referrer information to the linked website when the user clicks on the link. This can prevent the linked website from knowing which website the user came from, which can help protect the user's privacy.
In the context of affiliate marketing, using "rel=noreferrer noopener" in affiliate links can help protect both the affiliate marketer and the user. By preventing the linked website from knowing which website the user came from, it can make it harder for the linked website to steal commissions from the affiliate marketer by bypassing the affiliate link. Additionally, using "noopener" can help prevent certain types of attacks that could compromise the user's security.
However, not all affiliate marketers may be aware of the benefits of using "rel=noreferrer noopener" or may not be using it for other reasons. For example, some affiliate programs may have specific requirements for how affiliate links are formatted, and using "rel=noreferrer noopener" may not be allowed. Additionally, some affiliate marketers may not be familiar with HTML and may not know how to add the "rel" attribute to their links.