Guess what? This is a massively over-complicated look into guitar scales, major scales, and pentatonic scales and how to use them. Want to know some more efficient ways to go about using this stuff? Check out my article at this link:
Major Scale - Key of C, http://www.fretboardknowledge.com/kb/guitar/6string/eadgbe/eadgbe-scales/eadgbe-heptatonic/eadgbe-major/eadgbe-major-c/major-scale-key-of-c/, The C Major Scale, or C Ionian Mode, for Guitar.