Right single quotation mark
The Unicode character is used for both a typographic apostrophe and a single right quotation mark. This is due to the many computer fonts and character sets that unified the characters into a single code point, and the difficulty of software distinguishing which character is intended by a user's typing. There are arguments that the typographic apostrophe should be a different code point, U+02BC modifier [letter apostrophe|].
The straight apostrophe is even more ambiguous, as it could also be intended as a left or right quotation mark, or a prime symbol.