Comprehensive and Detailed Explanation From Exact Extract:
Ad Space Specification objects define inventory specifications such as TV programs for linear ads. Media Plan Placement represents the booking of ads into those specs. Media Channel is broader, and Ad Creative is related to creative assets, not media inventory.
Reference:
Media Cloud Ad Space Specification
https://help.salesforce.com/s/articleView?id=sf.media_cloud_ad_space_specification.htm&type=5

Comprehensive and Detailed Explanation From Exact Extract:
Media Plan Placement holds detailed ad sales planning data, and Contract Line Item captures sales contract specifics in ASM. Quote is a standard sales object, but Media Cloud extends sales data primarily into placement and contract line item objects. Ad Creative Size Type relates to creative attributes but is less focused on sales information.
Reference:
Media Cloud ASM Data Model
https://help.salesforce.com/s/articleView?id=sf.media_cloud_asm_objects.htm&type=5

Comprehensive and Detailed Explanation From Exact Extract:
The managed package includes OmniScript Definitions, CPQ APIs, Apex Classes, and Lightning Web Components as core functional components to deliver Media Cloud features. Other sets list supporting components but not the full package essentials.
Reference:
Media Cloud Package Contents
https://help.salesforce.com/s/articleView?id=sf.media_cloud_package_contents.htm&type=5

Comprehensive and Detailed Explanation From Exact Extract:
The official way to install ASM is via the release package installation link provided in the Salesforce Industries Success Community. This ensures installing the latest GA version for the target sandbox. Other options refer to trial orgs or enabling existing packages but do not follow the official installation path.
Reference:
Media Cloud ASM Installation Guide
https://help.salesforce.com/s/articleView?id=sf.media_cloud_asm_installation.htm&type=5