This is the 428th most frequent Italian word.
online
Connected to or accessible via the internet.
Here, 'online' is used as an adverb modifying the verb 'trovato', indicating the location of the course.
Ho trovato un corso interessante online.
I found an interesting course online.
The word 'online' is used as an adjective modifying 'negozio' to specify the type of store.
Il negozio online offre una vasta gamma di prodotti.
The online store offers a wide range of products.
In this sentence, 'online' functions as an adverb modifying the verb 'studiare', describing the mode or method of studying.