The move "1.d4" in chess is known as the Queen's Pawn Opening. It involves advancing the pawn in front of the queen two squares forward. This opening aims to control the center of the board, allowing for greater mobility of pieces and potential development of the bishop and knight. "1.d4" often leads to various established openings, such as the Queen's Gambit and the King's Indian Defense. Players who choose this move typically prefer strategic and positional play, focusing on long-term advantages rather than immediate tactics. It is a popular choice among both amateur and professional players.