1.1 All resources MUST be tagged with the following tags.
Use it to create a filter for an application or project. Make reports based on the filter.
dev, test, stage, prod
Use to create a filter on environment, to easily make cross-cutting changes.
I’ve seen few Azure subscriptions with only resources for one organization.
1.2 You MAY tag resources with additional tags that matches your need. Here are some examples.
Marketing, Finance, IT
For reporting costs on business unit.
Reporting costs across markets.
Level 1, Level 2, Level 3, Level 4
For ops team planning their security.