While the way your company organizes Confluence pages or spaces may be working currently, without an information architecture strategy in place as users and usage grows, it will become unmanageable.
Confluence's main usage is as a knowledge library that users can easily reference for help or to collaborate on projects. However, the common pitfall with large implementations of Confluence is the lack of structure and taxonomy to define where pages should be. This results in content being scattered, outdated, and pages that look too cluttered to be useful.
