A method of affiliate tracking that stores a small file in a visitor's browser when they click an affiliate link, attributing any subsequent conversion within the cookie window to that affiliate.

When a referred visitor lands on your site, a cookie is placed in their browser containing the affiliate's identifier and an expiry timestamp. If the visitor converts before the cookie expires, the sale is attributed to the affiliate. Partnero uses first-party cookies — set directly by your domain — for greater reliability across modern browsers.
Cookie tracking is the most widely-used attribution method and is easy to implement. The main limitation is that cookies can be cleared, blocked, or expire before a visitor returns to convert. This is why choosing first-party cookies and a generous cookie window matters for accurate attribution.
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