Nate Bosch with Piano Lessons demonstrates how to understand piano scales. A scale is a succession of notes played after each other. Scales can be major or minor and can have different modes. A scale is important because it helps define a key and helps to build chords in songs. Melodies can be created from scales. Practicing scales is important. Use a metronome to build up accuracy and your listening skills when practicing scales. Start out slowly and then build up your fluidity with scales. Understand that by learning scales and understanding the notes can help you to understand melodies and chords. Have fun with with scales.