FewCookies

Cookie glossary · Marketing

What is the TDID cookie?

Stores The Trade Desk's unique user identifier used for cross-site programmatic ad targeting and bidding. It is set by The Trade Desk and classified as "Marketing". Requires consent.

At a glance

Provider The Trade Desk
Category Marketing
Consent required? Yes
Typical domain .adsrvr.org

How FewCookies handles this cookie

FewCookies recognises TDID from our database of 1,300+ known cookies and classifies it automatically as "Marketing". The free check tells you whether this cookie is detected on your site and whether your banner handles it correctly — an instant, surface-level check, no account needed.

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Frequently asked questions

Do you need consent for the TDID cookie?

Yes. TDID is a "Marketing" cookie, so it is not strictly necessary. Under the ePrivacy Directive (2002/58/EC) and Romania's Law 506/2004, you must obtain the visitor's explicit consent before setting it.

What does the TDID cookie do?

Stores The Trade Desk's unique user identifier used for cross-site programmatic ad targeting and bidding.

Who sets the TDID cookie?

The TDID cookie is associated with The Trade Desk and is classified as marketing.