https://www.theverge.com/2019/1/22/18193322/twitter-desktop-update-emoji-trending-search

Twitter has started to roll out a new interface for its web users that includes several key features, like a newly designed emoji button.

The most important changes are tiny shortcuts to make tweeting easier. A large, dedicated button in the tweet box makes it easier to add an emoji, an updated trending section appears on the right-hand side of the page, and little aesthetic updates make it easier to see who’s involved in a conversation. These changes, alongside the way Twitter’s desktop version has condensed from three columns into two, should make it easier to both read and send tweets.