While listening，you can nod your head to show you in favor of his/ her views.

倾听时，你可以点头示意你支持对方的观点。

youdao

Dr Neave explains that humans move in three planes. You can nod your head backwards and forwards, side to side or twist your neck to look over a shoulder.

尼夫博士解释道，人的动作三个方面你可以前后点头，左右摆头，或扭头看向肩膀。

youdao

She is watching you and occasionally, you see her nod her head at you and indicate that you have made a good point.

她注视着你，并时不时地点一下头，这表明你的观点很不错。

youdao

It's a way to nod your head and say that you're okay with moving forward.

这个句型表示你会点头同意继续推进一件事情。

I'm ready to 课堂 - SpeakingMax英语口语达人

"All of this cooperative stuff always sounds great, and you'll get any group of intelligent people to nod their head yes, " he said.

WSJ: Reaching Outside The Ivory Tower

Typically, someone who is in agreement with you will smile and nod as you speak. (Disagreement shows up in compressed or pursed lips, clenched jaw muscles, or a head turned slightly away, so eye contact becomes sidelong.) But smiles are often used as a polite response and to cover up other emotions.

FORBES: Body Language Savvy for Sales