make is a utility is to determine automatically which pieces of a large program need to be recompiled, and issue the commands to recompile them.
To prepare to use make, you must write a file called the makefile that describes the relationships among files in your program, and the states the commands for updating each file.
Once a suitable makefile exists, each time you change some source files, this simple shell command:
make
suffices to perform all necessary recompilations. The make program uses the makefile data base and the last-modification times of the files to decide which of the files need to be updated.
We generally use make clean as a generic way to tell clean up the code.ie; remove all the compiled object files from the source code. You can name it as anything you like.