This bishop can put a lot of pressure on the board's queenside (typically in conjunction with a rook), especially if white has castled there.
The Dragon is one of the most esteemed Sicilian defense moves and falls among the sharpest openings in chess. It is named because of its alleged resemblance to the constellation Draco. Moving the g-pawn to g6 enables black to fianchetto her bishop on g7, which is the basic objective behind this position. This bishop can put a lot of pressure on the board's queenside (typically in conjunction with a rook), especially if white has castled there.