‍An affiliate link is tool used in affiliate marketing programs. A unique link is assigned to an affiliate partner by a partner program. When a website user clicks on the link, that click is attributed to the affiliate partner. The link contains the affiliate's ID or username to enable tracking. This means that traffic sent by the affiliate can be recorded (and rewarded).

If the person that clicks the link later converts (for example, by purchasing the software) then that conversion is also attributed to the affiliate partner.