Future updates will add more topics, Rob Bishop told Twitter on The Verge . The company has also been annoyed with the ability to "narrow the voices [ing]" of your tweets to people following a specific topic, though we suspect it may take some work.
The add-on joins a series of "finally" features that have reached Twitter in recent months. It is too soon to say whether the topics will be effective in practice, but it is potentially useful for attracting and retaining newcomers. Although Twitter may suggest that people follow it, it can still be scary if you are new. This allows you to quickly fill out your feed with helpful tweets and can encourage you to stick with it.