For social nets like Facebook, I'd use a regular headshot.

社会性网络如Facebook，我会使用常规的头像。

youdao

But even with the headshot, some people go for the funny picture, adding some character to their profile.

但即使用了头像，有些人还会倾向于有趣的图片，使他们的个人资料更有特色。

youdao

The simplest thing is a headshot and I suspect that's what the majority of people use when they are asked to upload a profile picture.

最简单的就是一个头像，我猜这就是大多数人当被要求上传个人资料图片时会选择的。

youdao

Invest in a professional headshot for your social media presence regardless of whether you are dating online.

FORBES: Personal Branding After Hours: Applying 10 Rules to Dating

All too often, it ends up as "headshot soup, " with photos of individuals all taken at different times and with different backgrounds.

WSJ: Why the photos on company websites shouldn't be just an afterthought

Sending a headshot to a friend via text feels forced, but sending a warm gaze or a silly face via Snapchat is natural.

FORBES: Snapchat Takes Over Yale With Viral Growth That Sends Facebook Back To School