What is subdomain consent?

Subdomain consent means allowing a user's consent choice to apply across related subdomains such as shop.example.com and account.example.com. This can allow preferences selected through a cookie banner to be recognized across the relevant subdomains.

The same choice can be reused when the original consent preferences cover the same purposes, technologies, and relevant parties across those subdomains.

If another subdomain introduces a new advertising vendor, tracking purpose, or processing activity, the existing consent may need to be updated. A shared preference center can help users manage these choices consistently.