The prevailing morality is to follow an arbitrary set of rules, mostly made by and for a class of people who have dominated the political sphere for most of human history. E.g. “If this will violate Ownership™ of a thing as defined by law, you shouldn’t do it.”
Another kind of morality is to consider the effects of an action. E.g. “If this makes someone’s life noticeably harder or more miserable, you shouldn’t do it.”
Another kind is to look at the social relations. E.g. “If this enriches yourself at the cost of someone who is already worse off than you, you shouldn’t do it.”