Much of what's in compliance management has been moved to, or is closely related to, items that are in the Security & Compliance admin center, so much of this will be covered in more detail in a later chapter (Chapter 8, Understanding Security and Compliance). Given that, we won't go into a tremendous amount of detail here.
Compliance management
In-place eDiscovery and Hold
The in-place eDiscovery and Hold feature is scheduled to be moved entirely to Content search in Security & Compliance later in 2018 or early 2019, and the same functionality is available there now, so we won't cover this one.