The feature should be available today.

It's an appealing addition if you often want to hear back from your Instagram audience. And for Instagram, the appeal is self-evident: it encourages Story creators to post more often knowing they'll get responses, while viewers may be more likely to watch knowing they can make their voices heard. This also gives Instagram an edge over its archrival Snapchat. You may be more likely to switch services if you know you can be more than a passive viewer.