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Committee members are responsible for adjusting the fee schedule of transactions. They provide blockchain governance actions.

Thanks you so much for your answer.
But unfortunately, it's like Arabic language to me. Couldn't understand anything.
On the other hand, maybe I don't even have to, it's just not for me.

Again, thanks for spending time on me and trying to explain it.

Look, there is someone who should take decisions on how the protocol is evolving: what are the parameters (like transaction fee), what improvements should be made, etc.
In order these decisions are taken easily and in the agreed order (unlike how it is managed in POW protocols), all network accounts are able to vote for the certain people they delegate their decision power to. These people are called committee members.

I got it, 100% clear now.
I can't help much, but if you need me to do anything, vote for you etc., will be glad to do it