This is the 77th most frequent Indonesian word.
tentang
"About" or "regarding."
In this sentence, "tentang" is used as a preposition introducing the topic of discussion, 'rencana akhir pekan.'
Kami berbicara tentang rencana akhir pekan.
We talked about the weekend plans.
Here, "tentang" is used as a preposition to specify the focus of the book's content, 'kehidupan di pedesaan.'
Buku ini membahas tentang kehidupan di pedesaan.
This book discusses life in rural areas.
In this usage, "tentang" introduces the subject of the presentation, 'teknologi modern.'