First make sure you have the write permission to the destination directories. In most cases you will need to login as root. Then type make install. The two main binaries: the GUI-version vrr and non-GUI Scheme console guile-vrr will be installed. The other installed binaries are tools:
Together with binaries, libraries and data files, also documentation files and examples are installed. You can choose the installation path by yourself by build/configure, the default paths are usually /usr/share/vrr/doc or /usr/local/share/vrr/doc.
After the installation, you can remove the generated binaries from the source tree by typing make clean or you can do an even better cleanup by make distclean.