After analyzing the board, the move that stands out is to drop our piece into column 4. By doing so, our piece would land on row 4 (since row 5 in column 4 is already occupied by an X), creating a horizontal segment of O pieces at row 4 (columns 2, 3, and now 4). This sets up a potential winning opportunity on our next move if we can extend the line further while also not giving an easy win for our opponent. Therefore, column 4 is the best move at this turn.