TDID cookie: what it does, who sets it, consent category

TDID cookie

Marketing cookie set by The Tradedesk, lasting 1 year.

Is TDID firing on your site before anyone says yes?

Conzent holds TDID and every other marketing cookie until the visitor accepts, and Consent Mode v2 keeps your Google Ads and GA4 reporting accurate. Registered IAB TCF CMP, Google-certified. From €7 per site a month.

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What the TDID cookie does

Registers a unique ID that identifies a returning user's device. The ID is used for targeted ads.

Who sets it

The Tradedesk — privacy policy

Consent category: marketing

Marketing cookies follow visitors across sites to build advertising profiles and to measure campaigns. They always require prior consent, and a consent banner has to block them until the visitor agrees.

Name	`TDID`
Category	Marketing
Lifetime	1 year
Set by	The Tradedesk

Other cookies from the same vendor

TDCPM

Is this cookie on your site?

Conzent's scanner lists every cookie your site sets, classifies each one the way this page does, and shows which are set before the visitor has consented. Try Conzent free for 14 days, or look up another cookie.

From the Conzent cookie database, last updated 2026-11-12. Descriptions come from vendor documentation, cookie policies and our own scans; write to support@getconzent.com to correct one.