What Does It Mean to Really Seek Justice?

The admonition seek justice is vague enough that it can be taken up for any cause, toward any end. What do you think the prophet has in mind when he says, seek justice, like in chapter one? And in he gets his little glimpses of like, specificity, chapter ten, maybe, or 58, or something like that? "There does seem to be a chief concern about widows and orphans"