What are some advantages or pros about gerrymandering?
That depends on which kind of gerrymandering is being implemented. There is racial gerrymandering which is designed to benefit certain racial minority groups, or other kinds of gerrymandering which designed to disempower them. There is partisan gerrymandering which might, like Bandit’s answer aluded to, help both parties re-elect their incumbents, or there is partisan gerrymandering which might help one party at the expense of the other. I’m sorry; I know you wanted a laconic answer, but the question itself is so vague that it is impossible to answer it without discussing the different types of gerrymandering that there are.
