Cross-references can be internal or external:
An internal cross-reference links to another section within the document, such as a procedure or checklist.
An external cross-reference links to external content, such as a website.
You can use cross-references in the following situations:
To provide context that would not be clear from a relationship table link. You can add a cross-reference inline if required for clarity.
In high-level tasks or checklists.
In Change history topics.
To provide a reference to an external target, such as a website.