This is the 255th most frequent Indonesian word.
online
Connected to or available through the internet.
Here, 'online' functions as an adverb describing the action of shopping that occurs on the internet.
Saya suka berbelanja online karena lebih praktis.
I like shopping online because it's more convenient.
In this sentence, 'online' serves as an adjective that qualifies the type of course services being offered.
Kami menyediakan layanan kursus online untuk para pelajar.
We provide online course services for students.
'Online' in this instance is used as an adverb to describe the method by which people are working, implying they are connected to the internet while doing so.