Twitter's Explore tab starts sorting stories into topic-based sections, such as News, Sports, Fun, and Entertainment, in the US for iOS
Context & Ripple Effects
This is the third step in a two-year rebuild of how Twitter handles discovery. The company first tested the Explore tab as a replacement for Moments in 2016, then began sorting popular tweets by topic on both mobile platforms in 2017; today's change extends that grouping from tweets to whole story categories — News, Sports, Fun, Entertainment — for US iOS users.
What makes the move consequential is where it points: by 2019 Twitter was planning to let users follow interests like sports and build separate AI-curated timelines, and by late 2021 it was testing a TikTok-style For You feed inside Explore. Today's sectioned tab is the intermediate layer between a trends list and an algorithmic interest graph.
First-order effects
- US iPhone users opening Explore now see stories pre-sorted into News, Sports, Fun, and Entertainment rails instead of one undifferentiated trending list, changing which stories surface first.
- Twitter, not the crowd, becomes the de facto editor deciding what qualifies as 'News' versus 'Fun' in each section — a curation judgment previously left to raw trend volume.
Second-order effects
- Publishers competing for referral traffic from Twitter now optimize for placement inside named topic sections rather than the trending list alone, raising the value of being legibly categorizable.
- The sectioned UI creates the scaffolding for the follow-interests timelines Twitter announced the following year, letting the company reuse the same category taxonomy across features.
Third-order effects
- If the pattern holds, Twitter's discovery model shifts structurally from users choosing whom to follow toward the platform assembling interest-based feeds — the same trajectory that later produced the For You experiment and, eventually, open-sourced ranking algorithms under scrutiny.
- Algorithmic topic curation at this scale also raises moderation stakes: whatever taxonomy Twitter builds for Explore becomes the lens through which breaking news and controversy are framed for mainstream users.
The trend: Twitter has spent years converting Explore from a raw trends list into machine-curated, interest-organized feeds, making editorial-by-algorithm the core of its discovery product.