A WHMCS Addons is a third-party add-on that can be integrated into WHMCS to provide additional panel functionality or to connect to another service. ,WHMCS Global Services for example, could create a WHMCS plugin to help resellers of our servers streamline the server ordering process, or resellers could add server administration services to their client area.

WHMCS Addons can be used to add new features to WHMCS, such as a new payment gateway or live chat integration. They are also used by third-party services and resellers to create solutions that integrate with the client area. That could be anything from server management services, to helping resellers streamline their ordering process with WHMCS.

WHMCS Addons allow you to create a custom solution for your clients. For example, if you offer reseller hosting services, you can create a WHMCS Addon that allows your clients to easily order additional server resources right from their client area.