What the hell is a wechat moment?
Do we really need 朋友 here?
Is 刷 1st or 4th tone here?
Is 'moments' really 朋友圈？
Yes, it is
"Moments" is the name of this feature in the English verdion of the WeChat app. The literal translation is "Friend Circle". Based on comments from other users here, I think it means "newsfeed."
I can't verify the Chinese name but it is the actual name on the English version of the WeChat app.
Have never heard of Wechat in the USA
Lots of Chinese Americans use it!