What is Mole?
If we talk of quantity a Dozen then it is 12
Pair= 2
Dozen and pair both are quantities without having unit,similiarly Mole is quantity which is equal to 6.023x1023.
Now imagine hypothetically if you would have been able to buy atroms,molecule or ions from a shop in the market then surely you would buy in mole wheather 1,2 or even 1000 moles.
Definition Of Mole:
the number of atoms,molecules,ions will be same as number of carbon atoms in 12gm.