In many ways, it usually means "Experience" or could mean "Use" depending on the context Some examples: "Santa Claus goes through many letters every year" meaning Santa reads many letters every year, he 'experiences' them "I sweat so badly that I go through 3 pairs of socks a day" This shows that the person 'uses' many socks a day 'Has/Have gone through' is more particular to experience Examples: "He has gone through a lot" Meaning the man has experienced many things, or has been emotionally exhausted