what do mean by bug tracking?give example?

" The "Bug Tracking" is a Tracking process of the status of the bug once it is detected and reported by the tester. The client and your PM or the test leads gets to know the number of bugs found and what is its status like : Assigned to the developer , Reopened or closed and also the severity and the priority of the bug.This is done with the help of various tools: Bugzilla, Test Director. "


- Vignesh