KCCH Cookie

What does the KCCH cookie do?

This cookie is used to avoid a race condition in the generation of PubMatic user IDs when multiple flows of execution occur simultaneously. It indicates whether another flow has already set a PubMatic user ID, preventing redundant attempts from the current flow.

Why this cookie matters

This cookie is commonly used by pubmatic for marketing purposes – such as tracking usage behaviour, optimising experience, or enabling marketing functionality.

Because it's categorised as marketing, many jurisdictions require that users give explicit consent before it can be activated. If blocked or denied by the visitor, personalised ads or retargeting features may not function properly.

How Cookifi helps you manage this cookie

Cookifi automatically detects cookies like KCCH, categorises them, and gives you full control over when and how they load - based on your users' consent choices.

Whether you manage consent via Google Tag Manager, consent APIs (like the Shopify or WordPress Consent API), or prefer automatic cookie blocking or manual script control, Cookifi integrates seamlessly into your stack.

Built for technical marketers, business owners and developers, Cookifi offers flexibility without sacrificing compliance.