Twitter do it again and again, there are so many updates on New Twitter.com. Here is some of it. Before read more details about what new on Twitter, check it out this video

New Design

Now you can see @mentions, retweets, search, and the list just above your timeline – to create a single, streamlined look to the left of the screen. On the right side, you can see the features you are familiar with, including recently followed and recently watched, favorites and trending topics.

New Twitter - Related Content

Mini profiles

You can click a @username to see a mini profile without navigating from the page, which provides quick access to account information, including bio and recent Tweets.

Rollout timing

These changes will roll out as a preview over the next several weeks. During the preview, you’ll be able to switch back and forth so you have time to grow accustomed to the way things work. Eventually, everyone will have the updated version of Twitter.com.

You can check complete details here. you can read more on Mashable too