https://thoughtbot.com/blog/the-magic-behind-configure-make-make-install

The configure script is responsible for getting ready to build the software on your specific system. It makes sure all of the dependencies for the rest of the build and install process are available, and finds out whatever it needs to know to use those dependencies.

If you or don’t program, or you install programs through a Software Manager or use Flatpacks, this isn’t really a part of your life.