The major pentatonic (penta = five) scale is a five note scale. It's a easily learned scale. Ideal to play and memorize as a starting gitarist.
Major Degrees: 1-2-3-5-6 or I-II-III-V-VI
Stepping: whole - whole - whole+plus+half - whole - whole-plus-half or W-W-W+H-W-W+H
Tonal: tone - tone - tone+plus+semitone - tone - tone+plus+semitone or 2-2-3-2-3
Commonly used in: country and western music