The Follow system is a powerful tool for linking together the tunings and mappings of various instruments in a song. This allows for a more seamless and accurate performance, as every instrument is guaranteed to be in tune with each other. Additionally, the Follow system helps to write music in just intonation, as every note played will be in tune with every other note. This is especially useful for live performances, as it ensures that all of the instruments are perfectly in sync. Overall, the Follow system is an essential tool for any musician who wants to ensure a flawless performance.