Al segno indicates that the player should go to the sign.
Da capo al segno (D.C. al Segno), "From the beginning to the sign ().
Al Fine (often abbreviated as D.C. al Fine): Repeat from beginning to the end, or up to the word Fine (should that appear at the end of the passage)—the word Fine itself signifying the end.
Segno : a notational sign specifically : the sign that marks the beginning or end of a musical repeat