Scales are groups of notes ordered by pitch or frequency, either going up in pitch or down. To learn guitar scales is a great way of exploring the fretboard of the guitar and finding the patterns that will help you with improvising solos and also it will increase the flexibility and strength of your fingers the more exercises you do. The very first guitar scale we recommend you learn is the minor pentatonic. You will probably be amazed at how familiar this scale is as its used in so much rock and pop music and is easy to fit over many styles of songs.
When learning guitar scales, it's very important to start slowly and accurately, then build up speed gradually. A case of making a strong foundation before you get faster.