It’s a very simple concept but I think it would help a lot of people like me that tend to forget things easily.
So for example, if I previously had made a note with the name “adjectives” and after a long time I forgot about this note’s existence. But then I decided to write a new note on “the English language” then mentioned the word “adjective” in the text. Usually I would just not link it to the old note because I don’t remember about it at all, but with this feature it would notice that I have a note named “adjectives” and would suggest the link to me, not outright making the link but just suggesting it.
It would allow me to make a connection that otherwise I would completely not notice, it’s specially useful when you have thousands upon thousands of notes done.