At a glance
| Provider | MGID |
|---|---|
| Category | Marketing |
| Consent required? | Yes |
| Typical domain | .mgid.com |
Do you need consent for _cmuid?
Yes. _cmuid is a "Marketing" cookie, so it is not strictly necessary. Under the ePrivacy Directive (2002/58/EC) and Romania's Law 506/2004, you must obtain the visitor's explicit consent before setting it.
This is general guidance, not legal advice — always verify with a lawyer.
How FewCookies handles this cookie
FewCookies recognises _cmuid from our database of 1,300+ known cookies and classifies it automatically as "Marketing". The free check tells you whether this cookie is detected on your site and whether your banner handles it correctly — an instant, surface-level check, no account needed.
Frequently asked questions
Do you need consent for the _cmuid cookie?
Yes. _cmuid is a "Marketing" cookie, so it is not strictly necessary. Under the ePrivacy Directive (2002/58/EC) and Romania's Law 506/2004, you must obtain the visitor's explicit consent before setting it.
What does the _cmuid cookie do?
MGID user identifier used to synchronize advertising audiences across sites.
Who sets the _cmuid cookie?
The _cmuid cookie is associated with MGID and is classified as marketing.