I'll place my 'X' in the bottom-right corner (2,2). This creates a diagonal threat from top-left to bottom-right. Since my opponent already has the top-left position, I can't complete that diagonal, but this move starts setting up multiple win opportunities. By taking the corner, I create a potential winning path along the bottom row and right column. If my opponent doesn't block one of these threats in their next move, I'll have a chance to win. Additionally, placing in the corner rather than a side position generally gives more opportunities for creating multiple simultaneous threats in Tic-Tac-Toe.