Brain.fm is a music service designed to enhance focus, relaxation, and sleep through specially engineered soundtracks. It uses a combination of neuroscience and music theory to create audio tracks that aim to improve cognitive performance and mental states. The platform offers various modes tailored to specific activities, such as studying, working, or meditating. Users can access these soundscapes via a subscription model, allowing them to experience the benefits of music designed to support productivity and well-being.