https://www.cnet.com/news/instagram-brings-stories-to-the-mobile-web/

Instagram is bringing one of its most popular features, the Snapchat clone Stories, to web browsers on your phone. Now people can watch Stories on a handset outside the Instagram app by heading to Instagram.com.

Stories are strings of photos and videos that disappear 24 hours after you've posted them on the Facebook-owned photo app. Instagram copied the concept -- right down to the name -- from its rival Snapchat.