A “Package” in WHM is a specific set of rules that define limits within a cPanel hosting account. A good example is when you may wish to restrict your users to 1GB of disk space, having that as a global option for the default package will help you do that.
Creating a New Package
Navigate to WHM > Packages by searching for "packages" in the sidebar. Then click Add a Package.
You'll want to give your package a name, and then you can choose what resources that package will have.
There are a variety of options that you can choose to restrict. The majority of our DoOO environments focus only on disk quota which we highly recommend restricting in some fashion. You can additionally choose options for how many databases or email accounts a user can create or how much email can be sent per hour to prevent abuse.
You’ll also find the option to enable or disable Shell access (SSH) as well as choosing a Feature List to be associated with a particular package (another great way to have restricted accounts using a default package but a “Power Users” package that has access to more tools).
NOTE: To see and edit existing packages, choose "Edit a Package" from the sidebar. You can then click on an existing package and click Edit to view and update its settings as needed.
Assigning a new cPanel Package to a User
If you need to change the package currently assigned to a user account, that can be done through WHM > List Accounts area by expanding the domain and clicking Change Plan:
You'll then see all of the available packages and can change the user's package as needed.