在 + 网上 + Verb
The noun 网上 (wǎngshàng) means 'online' or 'on the internet' and is used as a location word to indicate that something takes place on the internet. It is typically preceded by 在 to form a prepositional phrase. For example, 在网上走红 means 'went viral online.'
我在网上买了一双鞋,价格很便宜。
Wǒ zài wǎng shàng mǎi le yì shuāng xié, jiàgé hěn piányi.
I bought a pair of shoes online, and the price was very cheap.
现在很多人喜欢在网上看电影。
Xiànzài hěn duō rén xǐhuān zài wǎng shàng kàn diànyǐng.
Nowadays many people like watching movies online.
你可以在网上查一下这个餐厅的评价。
Nǐ kěyǐ zài wǎng shàng chá yíxià zhège cāntīng de píngjià.
You can look up reviews for this restaurant online.