Glossary · Tracking and tech
Device ID— what it means in affiliate marketing
A mobile device's advertising identifier — IDFA on iOS, GAID on Android — used to tie installs and events to a click.
Both can be reset or withheld by the user, and on iOS the default is withheld. Attribution built on the identifier alone has been unreliable since ATT shipped.
Related terms
| Term | Definition |
|---|---|
| Fingerprint | A device or browser identity assembled from dozens of technical details — fonts, canvas, screen, time zone, hardware. |
| MMP | Mobile measurement partner: the independent platform that attributes installs and in-app events. |
| ATT | Apple's App Tracking Transparency: an app must ask permission before tracking a user across other companies' apps and sites. |
Entry updated 15 September 2026. All 276 terms in one page.
