The VMware vCenter Support Assistant is used to collect diagnostic data on your vSphere environment. It is a free tool from VMware and is used to alert you of problems in your environment so that you can take action before they become bigger problems.
The Support Assistant performs the following functions:
Problems discovered by the vCenter Support Assistant will be reported to the vSphere Client as alarms. It sends proactive alerts along with recommended fixes. The notifications within vCenter Server will help you become aware of problems and then accordingly recommend solutions.
Allows the transmission of selected support bundles automatically by configuring the Assistant to collect support bundles selected by you and then transmits them to VMware Technical Support on a regular basis. The information will be matched against a list of known problems.
Provides the configuration of data collection times by allowing you to select the files, the collection frequency...