What is the purpose of LEDs on PC and gaming headsets?

Is it just for fun or do they provide some kind of feedback?

spacemissing2016-10-02T23:49:57Z

Depending on how the item is designed, it could be either or both.

An indicator gives some evidence that the item may be working ---
or at least "trying" to work --- but all too often that's as good as it gets.

Some items have very useful indicators, though.