what's the meaning of compiling before installation

some tutorials say that compiling panda3d-1.3.2.zip using makepanda before installation.i installed panada3d without compiling anything,so i don’t know what is the meaning of ‘makepanda’.if i dont compile panda3d-1.3.2.zip,is there any problem i’ll meet later.thanks.

You don’t need to compile Panda3D at all, especially not at windows.
But on some other operating systems, (not windows, but specifically osx and some linux distro’s), you need to compile it by hand.