Dear student,
A chemical equation in which the number of atoms of each element in the reaction and the total charge is the same on both sides of the equation is called a balanced equation.
Advantage :
The balanced equation will determine the exact amount of product formed.
We can easily determine the limiting reagent as well as an excess reagent.
Disadvantage:
If the equation is not balanced then it will be difficult to determine the moles of product formed.
Regards