uuid2 Cookie

What does the uuid2 cookie do?

This cookie contains a unique randomly-generated value that enables the Platform to distinguish browsers and devices. The uuid2 cookie is set by AppNexus and contains user-identifying data that distinguishes users across multiple browsers and devices, helping track ad effectiveness and optimize advertising performance.

Why this cookie matters

This cookie is commonly used by appnexus , xandr 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 uuid2, 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.