The Fuzzer tab shows you the requests and responses performed when you fuzz a string.
Selecting a row see the full requests and responses. You can also search for strings in the fuzz results using the Search tab.
The results have to be manually assessed to know if any vulnerability was found.
Right clicking on a row will bring up a menu which has the same options as the History tab. Plus providing an option to add messages from the fuzz results to the Sites Tree and History tab (the messages will be tagged
FromFuzzer and initially show a fuzzer icon in the Sites Tree).