Who are classified as High Volume Community (Portal) users?

High Volume Community (Portal) users are specifically categorized based on their licenses and the access level provided to them within the Salesforce platform. The correct classification identifies users who do not have defined roles and are assigned to licenses such as Customer Community or Authenticated Website licenses.

This classification is significant as these users typically represent a large number of external participants who interact with the community for various reasons but do not require the full suite of functionalities associated with higher-level licenses or roles. They are engaging with content, searching for information, or taking part in community discussions without needing comprehensive data access that higher-level users might need.

The licenses mentioned in the correct answer allow for a wider and more inclusive user base, making it viable to cater to large groups of customers or clients who need to connect with the business without necessitating full Salesforce features. Hence, this classification is essential for organizations looking to leverage community engagement efficiently while managing user access appropriately.