I need to block my opponent's immediate win threat in the top row where they already have two Os (0,0 and 0,1). By placing my X at 0,2, I prevent their win. This move also creates a potential winning opportunity for me along the right column, where I would now have Xs at positions 0,2 and 2,2. Additionally, it gives me a potential diagonal win opportunity connecting from top-right to bottom-left through the middle position where I already have an X.