The minor pentatonic (penta = five) scale is a five note scale with no second or sixth degrees. It's a easy scale pattern to play and memorize. This popular scale is frequently the first scale a guitarist.
Major Degrees: 1-b3-4-5-b7-8 or I-bIII-IV-V-bVII
Stepping: whole+plus+half - whole - whole - whole-plus-half - whole or W+H-W-W-W+H-W
Tonal: tone+plus+semitone - tone - tone - tone+plus+semitone - tone or 3-2-2-3-2
Commonly used in: blues, jazz, rock and popstyles