Question :
How does this provide me with the ability to find out where the presentation is saved in Finder?
text is typed into one or more of the four boxes in the Keynote Inspector > Spotlight
Spotlight uses these fields to search for this text
If I had a project called Edinburgh Castle - I would type that into Spotlight and it would find it faster than other methods.
Using Pages as my example, the last item at the bottom provides a way to find the document in Finder.
No this does not help find anything using Spotlight. This is part of the document statistics, it shows whether the document has been printed and the date and time of last printing, Clicking the Show File Info button will display the file info window.
Other related Questions:
Do you add information to Keynote/Inspector/Document/Spotlight frequently when you create any document?
I have never used the Spotlight information fields. I place Keynote files in a folder named after the project title so I look directly at that folder in the Finder.