The Cloud Bill Management Portal offers the possibility to create a Meta-tags Policy.
Go to Settings, and click on Tenant Metadata settings.
You will then be able to create a Meta-tags policy that will be available for each cost group.
It is mandatory to set up meta-tags keys before being able to have meta-tags availale on cost groups.
You can set up a list of meta-tags values or set it to free.
It is possible to create a meta-tags policy only for a certain cost group, you just have to chose the cost group for which you want to create the meta-tags policy.