Instagram does notify the owner of a post if you share it on your story. When you share someone’s post on your Instagram story, the platform automatically generates a mention or tag to the original poster. This means that the person who originally shared the post will receive a notification that their post has been shared on someone else’s story.
However, if you choose to share someone’s post directly with your friends or in a private message, Instagram does not notify the original poster. This type of sharing remains discreet and doesn’t create any notifications for the person who originally shared the post.
It’s worth noting that Instagram’s notification system may vary slightly depending on the user’s privacy settings. If a user has a private account, only approved followers can view their posts and stories. In this case, sharing their post on your story may only notify them if they have approved your follow request.
Instagram does notify the owner of a post if you share it on your story, but if you share a post directly with your friends or in a private message, no notification is sent to the original poster.