By placing my piece in column 3, I create O at position (3,5), which forms a strong horizontal connection with my existing Os at positions (2,5) and (5,5). This creates pressure and forces my opponent to respond. If I get to play again at position (4,3) later, it would create multiple threats. This move doesn't give my opponent any immediate winning opportunities and strengthens my position in the center of the board, which offers more winning patterns.