Where do I put my systemd unit file?

I read that there are two folders for unit files (not in user mode). /usr/lib/systemd/system/: units provided by installed packages /etc/systemd/system/: units installed by the system administrator Conflicting with this understanding is the answer to this question: How to write startup script for Systemd . Can someone fill in the missing information so that I understand what is going on? (**UPDATE: The answer has been updated, and my understanding no longer conflicts with it.**) Also, it seems that the scripts are organized in subfolders within the /etc/systemd/system/ folder: getty.target.wants multi-user.target.wants In another location I read that there are other locations. It seems these are for user-specific services. /usr/lib/systemd/user/ where services provided by installed packages go. /etc/systemd/user/ where system-wide user services are placed by the system administrator. ~/.config/systemd/user/ where the user puts its own services. ---- Update 2015-08-31: For the sake of others, here is a link to a related question I recently asked: Where do I put scripts executed by systemd units?