I like this poem about this seemingly insignificant punctuation!
Apostrophe to the Apostrophe
Small floater, you stay above the fray,
a wink at nothing’s nod, a raised brow
watching p’s and q’s, a selfless mote
between I and m, a little horn of plenty
spilling plurals, disdaining the bottom line.
Unlike your twin relatives—groupies of wit
and wisdom, hangers on in the smallest talk—
you work alone, dark of a crescent moon.
Laboring in obscurity, you never ask why,
never exclaim, never tell anyone where to go.
Caught up between extremes, you are both
a turning away and a stepping forth,
a loss and an addition. You are the urge
to possess everything, and the sure sign
that something is missing.