expression, godan verb (-ru)
become a topic of conversation; be in the news; be talked about
Used when a person, event, or thing becomes widely discussed, either in the media or among people. Often implies a sudden or notable rise in public attention.
彼の新しい発明が話題になっている。
His new invention is the talk of the town.
その映画は公開前から話
That movie became a hot topic even before its release.