i think it means "the same", "the following mean", "the equal"
sometimes it is expletive word. Sometimes it means "yes"
it has a lot of interpretations, depending on the context

Я так люблю сладости! - i like sweets a lot...here "так" as strengthening. It describes how strong he or she likes sweets.
Я бы сделал работу так же - here it means "the same"
А теперь напишите предложение вот так = "the following"
etc.