The technical methods used to attribute affiliate conversions that occur on mobile devices (smartphones and tablets), including browser-based tracking, app SDK tracking, and server-side postback tracking — each with different capabilities, limitations, and implementation requirements. Mobile tracking importance: mobile devices account for more than 60% of web traffic in most consumer categories; affiliate programs that don't handle mobile tracking well systematically undercount conversions and under-pay publishers for mobile-originated sales. Browser-based mobile tracking: standard affiliate cookie tracking works on mobile browsers (Chrome, Safari, Firefox) the same way it works on desktop; when a user clicks an affiliate link on mobile Safari or Chrome, a tracking cookie is set; if they purchase in the same mobile browser within the cookie window, the conversion is attributed; limitations include Safari's Intelligent Tracking Prevention (ITP), which restricts cross-site cookie storage and may shorten effective tracking windows below the stated cookie window for Safari users. App-based tracking: purchases completed in a brand's native iOS or Android app cannot be tracked by browser cookies; app conversion tracking requires either integration of the affiliate network's mobile SDK into the brand's app, or server-side postback tracking that fires when a purchase is completed in the app; brands with significant app-based purchase volume must implement app tracking to avoid systematically missing affiliate-driven app conversions. Cross-device tracking gaps: users who click an affiliate link on mobile and complete the purchase on desktop (or vice versa) are typically not attributed under standard cookie tracking because cookies don't transfer between devices; cross-device attribution is partially addressed by probabilistic fingerprinting (less accurate) or deterministic matching when users are logged in across devices (more accurate but requires user authentication).
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