I have never heard about it or never used
I have heard of, but never used
I can use it.
I can teach it.
I can build it.
I have followed various instructions and approaches, yet have never really been able to fully master the setup. Some themes like ZenPress are more complicated than others. There is always something that slips through. I have resorted in some cases to using a Header/Footer plugin for stuff like ‘Rel=Me’.