A "duo" refers to a pair of two individuals or items that work together or complement each other. This term is often used in various contexts, such as music, where a duo might consist of two musicians performing together, like a guitarist and a singer. The synergy between the two can create a harmonious experience for the audience. In everyday life, duos can be found in friendships, partnerships, or even in sports teams. For example, a dynamic duo might be two friends who always support each other, or a pair of athletes who excel in a particular sport. The bond between the two often enhances their overall effectiveness and enjoyment.