Intervals in music are an essential foundation for understanding how to use various modal scales to your advantage. Knowing certain intervals can make certain sounds when played over certain chords will allow you to see the fretboard in a whole new way. With this knowledge, you can discover new ways to learn scales, construct chords, identify notes that you hear in your head and subsequently express them on guitar.
Related Lessons
The Circle of Fifths will help you understand and remember the notes in any key.