The CAGED system enables you to work out your chords using the shapes of C A G E D.
Above here is E Major plotted all over the neck using all five shapes.
This will enable you to know the neck of the guitar much better.
Remember Chords are not just for strumming. Some don't learn the CAGED system as they think knowing a chord in one position is all you need.
See example below from Oasis song to see the use of the E Chord all over the neck
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