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_pubcid cookie

Marketing cookie set by Prebid.js.

Is _pubcid firing on your site before anyone says yes?

Conzent holds _pubcid 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 _pubcid cookie does

The _pubcid cookie stores a pseudonymous identifier for header-bidding ad auctions, enabling ad exchanges to recognize returning visitors across different publisher sites.

Who sets it

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_pubcid
CategoryMarketing
Set byPrebid.js

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.