To make a notation to text in a document to address later or for another person to review, use the
annotation
comments
footnotes
track changes

To make a notation to text in a document to address later or for another person to review, use the Comment

Explanation:

Comments in word document are used to review the document and suggest changes for improvement or appreciate for the content, etc.

Annotation: You can select the text and add an built-in annotation provided by the word document software. It would be available in the Annotate CE PRO ribbon. There will be options like “Awkward, positives, etc”

Foot notes are added information to a particular page. For example the writer can include links for further reference, note about the publication details, etc.

Track changes: This is to track the changes that has happened in the file from beginning to end.

storage maybe?

are there options?