下面句子的 help on 是多余的吗？它作什么成分？是什么意思？谢谢！

Go it alone. Even though you might feel more comfortable going with a friend or partner, the office hour will go better if it’s just you and the professor. You’ll get in more questions, the discussion will be tailored to what you need most help on, and two-party communication is almost always more productive than committee work. Your friend can wait outside for the discussion. (2015浙江卷七选五)