What should I do after compiling Gtk (and some other libraries) on Windows?

Hi, I compiled GTK, Libadwaita, Adwaita-icon-theme, and more on Windows. I can see the results in C:\gtk-build.
But can someone explain or share a link that tells me what I should do with those results? What exactly am I supposed to copy?

I have a gvsbuild folder in my project that’s ready to receive files, but I don’t know what to put there.

Thanks in advance for your help!