9/8 time is a musical time signature that indicates there are nine beats in each measure, with each beat being an eighth note. This time signature is often used in genres like jazz, folk, and world music, creating a lively and complex rhythmic feel. In 9/8 time, the beats are typically grouped into three sets of three, giving it a triplet feel. Musicians often use this time signature to add variety and interest to their compositions, allowing for unique melodic and rhythmic patterns that stand out in a piece of music.