"网上面"的意思是在网络上，也就是用电脑或者手机上网的时候。

"网上面" means on the internet, that is, when using a computer or phone to go online.

我们常常说"网上面"来表示在互联网上做的事，比如买东西或者看视频。

We often say "网上面" to refer to things done on the internet, like shopping or watching videos.