First of all, let's make all things clear. Guitar scales are derived from numerous different styles. Not only this, they also come from various parts of the world like: Asia, Polynesia, Eastern Europe and other areas. As an example: Hungary, where they've got the Hungarian gypsy scale. Their music is definitely affected by the culture.
Clearly enough, the western community has produced several scales of its own as well. They are: major scales, minor scales, pentatonic scales, chromatic scales, and some more which were created in line with the previous ones.
At this point let me explain to you what the critical logical reasons you need to master them are.
First of all, don't be discouraged straight away since it does not imply that you need to learn all of them at the same time. It is best to study one scale at a time.
Let's talk benefits for a minute. One of them would be the fact learning several guitar scales adds to the agility and strength of your palms. More importantly, practicing them can assist you in training your hearing to recognize standard note arrangements. It's particularly valuable when selecting notes when you do music improvisation and/or writing. Merely by being aware of the notes you can add your own personal color, depth, atmosphere and emotion to your guitar playing.
I trust you can see the value of guitar scales by now. So it's time to sit and learn a number of them. Here is my advice, between numerous guitar scales that one can choose from, I'd say you begin with major scales. They are actually the most important scales with regards to relevance and use in most styles of music. Additionally, other sorts of scales were fundamentally derived and constructed from them.
A standard major scale consists of 7 different notes, in which the first sound is the main sound. When you have perfected it it is simple to understand its minor equivalent, which is basically covered inside the major scale. The one that I suggest you to begin with is the C major guitar scale. It's the simplest scale without any sharp or flat sounds.
Now the rough reality. Mastering your very first scale can be very demanding, however, you only have to show patience and proceed through with it. Once you are proficient with the C scale you can study the other 4 most basic major scales. They are: G, D, A and E. Everything begins with these five.
The next phase after mastering the fundamental major scales is to try out the minor scales, then the pentatonic guitar scales, then the blues scales, and so forth. It's nearly a never-ending voyage, however it is surely worth the effort. If you wish to be capable to improvise around a well known tune with your own sounds then there is no better strategy for reaching this than by working on various guitar scales.
In order to fully understand your scales, make sure you perform them as a warm up prior to the actual lesson. Additionally, memorize the proper placement of the fingers on each fret. Then perform the scale from the start to end and the other way around.
If you genuinely wish to improve and go further with your guitar skills, then this is the solution! Perfecting, or at least familiarizing yourself with scales will certainly be a wonderful addition to your typical guitar lessons.