Even though you don't have to use them they have some great benefits.
For instance having a guess at your username you might be the secretary of a club or association.
By having a smart meter you can see your daily usage and can use the data on Your Account Page to help manage the finances and reporting on a regular basis to the various committees.
If you have a shared ground you could use the data to work out pro-rata payment for the cricket club or the footy club.
It is supplied at no cost and has many benefits.
PS If you find my post helpful please click the LIKE Button.