Raga is a style of Indian music that is based on melodic modes. It is an improvisational form of music that is often used in classical Indian music. Raga is composed of a set of notes that are used to create a melody, and it is usually accompanied by a drone instrument such as a tambura. The notes of the raga are used to evoke certain emotions and moods, and each raga has its own unique sound. Raga is an important part of Indian culture and is often used in religious ceremonies and festivals.