Hard to say without being a bit more specific. They’re a great way to learn your way around the fretboard, can be used in solos and creating melodic phrases – many things really.
Take a look at this series of lessons here, it should give you an idea.
https://www.guitar-chords.org.uk/blog/caged-system-and-chord-tone-soloing-part-1/
Lee Answered question March 10, 2022
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