State belongs to the store if it is SHARI.

• Shared: Shared state is accessed by many components and services
• Hydrated: State that is persisted and hydrated from storage
• Available: State that needs to be available when re-entering routes
• Retrieved: State that needs to be retrieved with a side effect
• Impacted: State that is impacted by actions from other sources

See: Reducing the Boilerplate with NgRx - Brandon Roberts & Mike Ryan