Soul jazz is a subgenre of jazz that emerged in the late 1950s and 1960s, blending elements of jazz with rhythm and blues, gospel, and funk. It often features a strong, catchy groove and emphasizes improvisation, making it accessible and appealing to a wider audience. Key instruments typically include the organ, saxophone, and trumpet. Notable musicians associated with soul jazz include Jimmy Smith, known for his innovative use of the Hammond organ, and Horace Silver, who incorporated catchy melodies and rhythmic patterns into his compositions. This genre played a significant role in the evolution of jazz, influencing later styles like fusion and smooth jazz.