What is the `IDE` Cookie?

Set by Google DoubleClick (Google LLC). Expires after 2 years.

Purpose

Used by Google DoubleClick to register and report the website user's actions after viewing or clicking on one of the advertiser's ads to measure efficacy.

One of the most long-lived advertising cookies. Requires explicit marketing consent.

Cookie Details

Cookie Name	`IDE`
Service	Google DoubleClick
Provider	Google LLC
Category	Marketing / Advertising
Duration	2 years
Consent Required	Yes — requires explicit opt-in

Category: Marketing / Advertising

Marketing cookies are used to track visitors across websites to display relevant advertisements. Consent is required under GDPR.

GDPR Requirements

Under GDPR and the ePrivacy Directive, the IDE cookie requires explicit user consent before it can be set. This means:

The cookie must not be set when a user first visits your site — not even for a fraction of a second
A consent banner must be displayed, and the user must actively accept analytics/marketing cookies
If the user rejects or ignores the banner, this cookie must remain blocked
The cookie must be listed in your cookie policy with its name, purpose, and retention period
Users must be able to withdraw consent at any time, which must also remove or invalidate this cookie

How to Handle This Cookie

Block it by default — configure your Consent Management Platform (CMP) or tag manager to prevent Google DoubleClick from loading until the user accepts marketing cookies.
Include it in your consent categories — map it to the "Marketing / Advertising" category in your CMP configuration.
List it in your cookie policy — document the cookie name, purpose, provider (Google LLC), and expiry (2 years).
Sign a DPA — ensure you have a Data Processing Agreement with Google LLC covering their use of data collected via this cookie.
Verify it works — in an incognito browser, reject cookies and confirm IDE is not set.

Other Google DoubleClick Cookies

Cookie	Category	Duration
test_cookie	Marketing / Advertising	15 minutes

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