Used to throttle request rate. If Google Analytics is deployed via Google Tag Manager, this cookie will be named _dc_gtm_. Whilst many customers were impressed, one shopper said it was 'too slow': "Terrible TV guide (so slow). Picture is great but everything is frustratingly slow to respond when you first turn on." Used to store visitor-level custom variable data. This cookie is created when a developer uses the _setCustomVar method with a visitor level custom variable. This cookie was also used for the deprecated _setVar method. The cookie is updated every time data is sent to Google Analytics.

Not used in ga.js. Set for interoperability with urchin.js. Historically, this cookie operated in conjunction with the __utmb cookie to determine whether the user was in a new session/visit. Used to ensure user session remains with the same AWS instance to improve performance and stability. Session token to be used to authenticate requests on behalf of an anonymous user. Session tokens are linked to a client ID (see clientId) Chat Widget offers out-of-the-box cookie consent management, see here: Enabling cookie consent for the Chat widget & Web SDK Web Widget offers pre-built API functionality for cookie consent; see here: Web Widget Cookie Permission in Developer Center

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Contains a token that can be used to retrieve a Client ID from AMP Client ID service. Other possible values indicate opt-out, inflight request or an error retrieving a Client ID from AMP Client ID service. Used to determine a user's inclusion in an experiment and the expiry of experiments a user has been included in.