That app, Instagram, added its Snapchat-aping “Stories” feature last August, almost a full five years after Snapchat launched. But according to an Instagram announcement earlier this month ...

Instagram caught many by surprise this week when it revealed it was launching a new feature called Instagram Stories, which looked almost exactly like the Snapchat feature of the same name.

Snapchat may be losing ground to Instagram with some of its most important users: teens. Instagram is now the most-used social media platform among teens, according to research firm Piper Jaffray.

For a while now, Facebook has been adding Snapchat-like features to its mobile apps, including Facebook, Instagram, Messenger, and WhatsApp. It appears that strategy worked quite well for the ...