There are two kinds of in-product help to assist users in understanding the UI that they are using: Embedded Help and Help Center.
In-product help overview
For both in-product help experiences, ServiceNow® provides some help content out of box, and you can replace it or create your own custom help content based on the needs of your users.
Embedded Help provides targeted help content to a user in a page in the classic environment based on the user's role. For more information, see Embedded Help. Figure 1. Embedded Help for a Catalog task page
The Help Center is the next-generation Embedded Help product for configurable workspaces. The Help Center provides targeted help content to users based on their role and specific to their location in a configurable workspace or page built with the Next Experience UI Framework.
Help Center will display Embedded Help content, so you do not need to rewrite any content you previously created for Embedded Help. For more information, see Help Center. Figure 2. Help Center within the Service Operations Workspace