1.
topic, subject (of conversation)
What is being talked about; the subject matter of a discussion or conversation.
She always has plenty of topics to talk about, so conversations with her are enjoyable.
話題が豊富 = to have many things to talk about
If you share a common topic, it's easy to get along with someone you've just met.
共通の話題 = a common topic of interest
2.
hot topic, trending topic
Something that is currently being widely discussed or is popular.
This movie is a hot topic. / This movie is being talked about.
話題になる = to become a topic of discussion
That restaurant is the one everyone's talking about right now.
話題の + noun = the much-talked-about ~
I tried buying the much-talked-about new product, but it wasn't as good as I expected.
That news became a big talking point around the world.
大きな話題になる = to become a big talking point
Related Words
Contrast:
題名