As you explore guitar theory, you'll learn that the major scale is a series of notes played in an ascending and descending fashion. Guitarists use the major scale to play melodies, riffs, solos, and bass lines. Additionally, it's used to play intervals, build chords, and chart progressions.
The following sample patterns show you how to play the G major scale in four positions on the fretboard:
Credit: Illustration courtesy of Desi Serna