# Concepts

> Understand Secret Manager concepts including hierarchy, service access, and structure for managing secrets across your organization.

The concepts page covers the hierarchy of secrets and the structure of secrets.

| Page                                                                  | Description                                                      |
| --------------------------------------------------------------------- | ---------------------------------------------------------------- |
| [Hierarchy](/services/secret-manager/concepts/hierarchy.md)           | Learn about the hierarchy of secrets and how they are organized. |
| [Structure](/services/secret-manager/concepts/structure.md)           | Understand the structure of secrets and how they are stored.     |
| [Service access](/services/secret-manager/concepts/service-access.md) | Control which Unity services can access your secrets.            |