Josh Constine, writing at TechCrunch:
People only post the highlights of their life on Instagram, so today the app adds its own version of “Stories” to poach goofy, off-the-cuff, everyday content from Snapchat. It works exactly like Snapchat Stories, allowing you to post 24-hour ephemeral photo and video slideshows that disappear. But because Instagram Stories appear at the top of the old feed, your followers will inevitably see them without you needing to build a new audience in a different app.
I mean, yeah, it is a clone of Snapchat’s feature, but it is also exactly why I post rarely to Instagram and post stupid things all the time on Snapchat.