This minor pentatonic scale is another form pattern that isn't used as much as the 1st, 2nd and 5th. You'll still want to be familiar with it to be solid with the minor pentatonics.
Scale Patterns are moveable scales where fingerings don't change from key to key. The root note (green dot) names the key of scale. What does this actually mean? It means you simply learn this pattern and you immediately know all 12 keys. You just need to place it on the correct fret to play the scale in a particular key.