Can someone tell me what does those command does in bref

./configure
make
make install
thks

Are you familiar with programming, I mean even briefly? Take a look at configure script, after you ran ./configure take a look at Makefile. In short, configure checks your system for presence of dependencies needed for a peice of software you are installing and creates Makefile accordingly, make then uses Makefile targets, plain make compiles the software with set of flags defined in Makefile, and make install copies the binaries, libs to designated locations also taken from Makefile.
And the last one thks I have just a slight idea what it does, most often it echos back
You are welcome

this is exactly the kind of answer i needed...

Can you tell me also about:
make dep
make clean

Ok, make dep sets up the dependencies that are availabel in the current release of the software you are trying to install and these deps are not on your system but they come with the software you are trying to install, confused? make clean removes unneeded files, it is all in Makefile what files are removed if you run make clean.