Practicing scales, It's kind of like the old joke " Why did the chicken cross the road?" Answer: To get to the other side. We practice scales to get to the other side. The other side being that scale practice leads to playing cleaner notes, improved finger strength, better articulation, melodic ear training, better tone, cleaner chord changes, a better ability and understanding to play in time when practicing scales with a metronome, easy warm up ideas, speed and better all around control of playing guitar, no matter what genre or style of music you play on the guitar. Practicing scales is one of the major fundamental building blocks of playing music and guitar. I highly recommend starting a scale practice routine at the beginning of every practice session to my students. In fact, I require it. The first 10 to 15 minutes of your daily practice on the guitar should be warming up with the Major and Pentatonic scales with a metronome. This will give you the quickest results and one of your biggest returns on investment in learning and playing guitar. I have been playing for over 44 years and I still practice my scales every time I play. Practicing your scales at the beginning of your practice session ensures that you WILL practice your scales and it is a great way to warm up.