The application tags are used to restrict user access to the application. Specifically, only users with tags listed in the application tags are allowed to log in. For example, the application
dev_app has tags
dev, prd. Only users with the tag
prd can log in to
dev_app. Please note that admin and global admin users are not affected by application tags.
On the application edit page, you can find the
Tags configuration section where you can add tags.
Here is a video demonstrating how application tags work: