On top of certifying the various MEUs SOC, the unit also provides a variety of special operations training ranging from CQB to scout swimmers to spie rigging and much much more.
There are also various other definitions of the acronym (more than likely created by the Marines in the unit itself). These include but are not limited to:
SOTG - Society Of Tough Guys
SOTG - Special Olympics Training Group
SOTG - Sorry Our Training's Gay