Currently you can only add Tags in OneNote on Mac
However when you want to Search for that particular Tag throughout OneNote, the Search Tag feature does not exist - which defeats the objective of being able to assign these Tags in the first instance as the beauty was through Search Tag feature all those entries with a particular Tag assigned would be highlighted when searched for
Yet this search feature exists on PC's - Sadly to MS Offices loss, not on OneNote Mac
Integrating this Tag Search feature into OneNote on Mac will certainly make OneNote profoundly useful & very likely attractive to other users who have yet to benefit from OneNote
Many Thank
Kindest Regards
IU