What it means
An Affiliate Link is a unique URL carrying the affiliate's identifier (and often a SubID). When a visitor clicks it, the network records the referral — usually by setting a cookie or firing a server-side event — so any resulting conversion is credited to that affiliate.
Every affiliate link carries an identifier that maps back to a specific partner account inside the tracking platform, usually as a query parameter such as ?aff=1042 or as a path segment on a redirect domain. When a visitor clicks, the network logs the click, drops a cookie or records a server-side identifier, and forwards the browser to the advertiser's landing page. That logged event is what later ties a purchase or signup back to the affiliate who sent the traffic.
Most links route through an intermediary redirect before reaching the destination, which lets the network capture click data, apply the affiliate ID, and sometimes rotate creative or destinations without the affiliate editing anything. This redirect step is invisible to users but essential to attribution, since it is the moment the tracking record is created. Some programs also support vanity or branded links that mask the raw tracking URL for a cleaner appearance.
For affiliates, the link is the single point of failure in getting paid: a stripped parameter, a broken redirect, or a link that points to the wrong campaign means clicks generate no credit. Advertisers care because malformed or hijacked links distort reporting and can route commissions to the wrong partner. Both sides benefit from testing links end to end before a campaign scales.
Common pitfalls include social platforms or email clients truncating parameters, aggressive ad blockers stripping known tracking domains, and affiliates hardcoding old links that a program has since retired. Cloaking or shortening links can improve click-through but may violate program terms or trigger spam filters, so partners should confirm what is permitted before masking a URL.
Key points
- Contains a unique affiliate ID that maps clicks to a partner account
- Usually passes through a redirect that logs the click and applies tracking
- A stripped or broken parameter means no commission is credited
- Test links end to end before scaling any campaign
- Cloaking or shortening may breach program terms if undisclosed
Example
An affiliate promotes a hosting plan with the link host.com/go?aff=1042. A reader clicks, the network logs click ID 1042, and the browser lands on the pricing page. Two days later that visitor buys a $120 annual plan, and because the tracking record still ties back to ID 1042, the affiliate earns the agreed commission.
Also known as
Related terms
SubID
A custom parameter appended to links to track granular traffic sources.
Deep Linking
Sending affiliate traffic to a specific inner page rather than the homepage.
Cookie Window (Cookie Duration)
How long after a click an affiliate can still earn credit for a conversion.
Postback (S2S Tracking)
Server-to-server conversion tracking that fires without browser cookies.