What does the || : in this line of bash script from an rpm spec file do?

Question

ln -s /var/log/$SERVICE_NAME $RPM_INSTALL_PREFIX/logs || :

In the rpm spec file every line ends with || :

What is the

Answer 1

It is simply means OR. You can try small testing like this

ls nofile-here-like || echo 'Not here'

If file not there echo will printed. Try with existing file, it will not