Debugging is the process of finding the problems that occur in computer programs. It is a multistep process to identify the problems and easily determining the programming flow, to work around it.
And all debugging process is handled by the debugger.
A debugger is an another type of program that allows user to step through another program line by line at a time. This is very useful for checking incorrect code and analyzes how a programming "flows" works. The Key concepts of debugger that include- Breakpoints, Stepping, and Viewing data.
Thus the debugger can also show how the computer sees your programming codes.