Answer:
From a legal standpoint, it's a group of laws designed to protect the rights (and incomes) of creators. From a moral standpoint, it's essentially the same: protecting the rights of creators. Because copyright violations are so easy and so frequent, law enforcement has no chance of monitoring and prosecuting every violator; thus, it functions more on the "honor system," relying heavily on individuals' ethical and moral codes to ensure the rights of creators are respected.