Tags/Mentions Apple Numbers

In Numbers, as you've probably seen, you can add a comment to a cell that will be visible to all.

However, I'm not sure whether that sends a special alert (I don't think so but you could easily test that).

Have you read through the collaboration explanations in the online Numbers User Guide?

If you feel that is an important feature you can leave feedback with Apple at Numbers > Provide Numbers Feedback in your menu.

SG

Numbers is not a social network.😀

So it is hard to picture what you have in mind.

You can insert a hyperlink in a cell that links to a webpage, email or phone number.

SG