On FIFA 19, You need to hold down the L1 and R1 buttons then press circle on PS4 or hold LB and RB on Xbox One and press B. You need to make sure that you are holding down both buttons as just pressing the L1/LB button will make your player take a chip shot.
This method of using the low driven shot has changed since FIFA 18 when it was particularly effective and resulting in a goal. In the latest version of the game, this shot is best used when your player is parallel to goal and you can just inside your opponent’s penalty area.