hay ,this may be asked many a times but can someone please tell me what this all means? Sounds like a beauty therapy session but does it heighten the sound or feel of the ukulele in any way. thanks
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fret dressed and polished
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fretboard oiled and waxed
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nut and bridge adjusted
I'll take a shot at it: Those are elements of a set-up.
Fret dressing and polishing involves, usually, leveling the frets such that there are no high spots or low spots relative to the other frets. This is done by abrasion mostly, so then the frets are polished smooth. This keeps your strings from buzzing or deadening out. It often also means you finish the edges by either rounding or beveling them smooth.
Oiling and waxing the fretboard is just that. It means taking super care of the wood so it will resist cracking and hand gunk. Usually people use some kind of oil (mineral oil, lemon oil, orange oil) to clean the fretboard, and on some woods they wax it like furniture or floors.
Nut and bridge adjustment means to make sure the notches in the nut are at the appropriate depth and width for the string to ride in it, plus make sure the string rides at the appropriate height above the frets. Adjusting the bridge means this, too, and also making sure the bridge fits in the tailpiece like it should so your instrument vibrates right and notes sound and ring appropriately.
Someone qualified doing this for you is a lovely, lovely thing and it will make your instrument much more enjoyable. A well-set up instrument is a joy and a blessing; a poorly set up instrument is a sad thing.
(How'd I do?)