Pentatonics are overblown arpeggios. It's a great way to learn and understand harmony. Only string players have this luxury. Guitar is visual. Overlaying pents on top of each other, in one position, you'll find amazing things. It becomes a real easy way to connect chords melodically. It's especially useful in country, jazz or advanced R&R. Know where the blue note is. (b5) Know where the b3 and 3rd are.
Most new players play one pentatonic for the entire tune.
Those same players do not work out those note in terms of the chords they're playing. Overlaying the appropriate pattern over the specific chord or tonal center you are playing, will give tremendous and more continuity to a tune or improvisation. Make your licks or phrases shorter and then string them together.