Each pentatonic scale is made up of two notes on each string. To make things easier we will call the first group of notes the beginning notes, and the second group of notes the end notes. Play the animation below and you will see the end notes of the 1st scale are the same as the beginning notes of the second scale. This happens with every scale, so each scale fits together like a jigsaw puzzle.
The diagram below show the guitar fretboard with all 5 pentatonic scales placed in there correct order. There are no fret placing's marked because these are moveable patterns and it doesn't matter if you start on the 1st or the 10th fret .The patterns will still follow suit exactly the way it is shown below. You can see how each scale shares a part of the scale before or after it, intertwining the 5 pentatonic scales into one big group of notes. It looks a little confusing when it's laid out all together, but once the animation highlights each individual scale it becomes more clear. By breaking the fretboard down into 5 different shapes it becomes easier to learn these group of notes quickly.
These 5 pentatonic scales play a major roll in breaking the fretboard into patterns. They are the skeletal structure of the CAGED system. The CAGED system breaks the fretboard into 5 different chord shapes, within those 5 chord shapes these 5 pentatonic scales are found. You will also find the diatonic (Major or Minor) scales over the pentatonic shapes.
What I'm trying to say is....
IF YOU WANT TO BE A GOOD GUITARIST THEN LEARN THESE SCALES.