What advantage did aircraft most contribute to World War 1?

Aircraft in World War I provided significant advantages in reconnaissance, allowing for real-time intelligence on enemy movements and troop positions, which was crucial for strategic planning. They also enabled aerial combat, which introduced a new dimension to warfare, disrupting traditional ground tactics. Additionally, aircraft were used for artillery spotting and bombing missions, enhancing offensive capabilities and targeting enemy supply lines. Overall, the introduction of aircraft transformed battlefield dynamics and strategies during the war.