Quotations are also used to set off the titles of small works, and anytime Words are those of someone else (including dialogue).
Quotes are also used about a
Word to show that the
Word is being used outside of its normal connotation.
"Marshal, why don't you give Inspector Williams a sample of our 'special' cocktail?"
"Our special cocktail?"
"No Marshal, our 'SPECIAL' cocktail."
"Oh you mean the 'special' cocktail."
"Yes Marshal the 'special' cocktail. You'd like to try our special cocktail wouldn't you Inspector?"