The main resources to monitor are the real use of disk space and traffic. Even if a client account does not reach the volume and traffic limit of the hosting package to which it is associated, we can always see the real use of customer accounts in disk space and traffic.
In order to obtain this figure in the WHM system, click on Accounts Fuctions in the Create a New Account option.
In the table shown, there is a division between the Disk Space and the Bandwidth (monthly) of the Reseller program, and the system data at the bottom, which distinguish between the different hosting packages which have been established according to the number of possible client accounts to open each package.