The playground chasing game known as 'TAG' is a popular game among children. It involves one person being designated as 'it' and then attempting to TAG other players, who must then become 'it'. The game is often played outdoors in a playground or park setting. The objective of the game is for the 'it' player to TAG all the other players before they can reach a designated safe area. The game is a great way for children to get exercise and have fun.