sorry moderator, if i post my thread in wrong section

i have question about MT4 feature called multiple close by
what is the functions of multiple close by ?for me it is more like we open a hedging trade and close it one by one.

what is benefit closing hedged order with Multiple close by function?

it is reduced our spreads or our commisions if we closed it with multiple close by ?
if we close our hedged trade manually , we will charged double spreads and commisions. how about multiple close by?