How do you actually create "associated links" in a note and how can they be used

How do you actually create "associated links" in a note and how can they be used

Notebook provides you the ability to view "associated links" for an individual note. I found one reference in Quora to the fact that we can create these from Zoho Projects, Mail and Meetings but nothing to say where or how you can do this and where elkse you can do this.

Now maybe I am misunderstanding the concept as it doesn't get described anywhere in the Notebook resources so I am left to my own imagination which seems to be wrong.

Does anyone know what this feature actually exists to provide, where it can be used and how?

Conceptually it sound great... anything I have in Zoho I can relate some notebook note... well maybe that is what it is or isn't...???
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