I'm choosing column 4 because it allows me to build upon my existing O piece at the bottom. By placing here, I start creating a vertical stack of two O's. This gives me a strong foundation for a potential vertical connect 4 if I can add two more pieces in future turns. The position is centrally located, which is strategically valuable in Connect Four. There are no immediate threats I need to block, and this move doesn't create any winning opportunities for my opponent in their next turn.