What the _cb cookie does
The _cb_session_id cookie (often shortened to _cb) is a first-party cookie used by Conversion Bridge to track visitor journeys and conversions.
Who sets it
Consent category: analytics
Analytics cookies measure how a site is used, in aggregate: pages seen, sessions, where visitors came from. Under the GDPR they need consent before they are set, and Google Consent Mode can model what is lost when visitors decline.
| Name | _cb |
|---|---|
| Category | Analytics |
| Set by | Conversion Bridge |
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From the Conzent cookie database, last updated 2026-10-11. Descriptions come from vendor documentation, cookie policies and our own scans; write to support@getconzent.com to correct one.