Need explanation of bitset

#1

what is the difference between bitset,array of bool ,vector of bool???

#2

in vector or array of bool
0 and 1 are stored as bool hence take 1 byte to store

in case of bitset
0 and 1 are stored as bits so take only 1 bit

1byte=8 bit
hence we can say bitset can store 8times more than bool