In a basketball game, players can signal for a timeout by raising one hand above their head and waving it, or by calling out to the referee. This gesture is crucial as it provides an opportunity for teams to regroup, make adjustments, or discuss strategy during the game. Typically, each team is allowed a specific number of timeouts per half or game, which can greatly influence the game's flow and momentum. The prompt request for a timeout can also prevent opposing teams from exploiting a strategic advantage.