The pentatonic (i.e. 5 note) scale is used extensively in popular music including rock, blues, jazz and country. It’s a very easy and practical scale to begin trying to improvise with as you can’t really hit a wrong note. This lesson is in C so you use the c,d,e,g,a notes to create a lead guitar solo. A standard chord progression in C would use C, F, G, chords. The notes that form these chords are C (c,e,g), F (f,a,c), and G (g,b,d) so you can see that the chord tones are present in the C pentatonic except for the notes b, and f. If you want to sound like you know something about soloing be careful to avoid emphasizing the ’c’ over the G chord. Learn the chord tones and when your ear detects the G chord pick out a lead line using g,a,b,d,e notes. And guess what? Yes, those notes make up the G pentatonic. Ah, music maestro!