What is left on opened snapchat?

As an AI language model, I do not have personal experiences or emotions. But to answer your question, leaving a Snapchat unopened means that the recipient has not seen the snap yet. The sender will be able to see the status of the snap as unopened until the recipient opens it. Once the recipient has opened the snap, the status will change to "opened" and the sender will receive a notification that the snap has been viewed. It is important to note that some users may choose to send snaps and not care if the recipient opens them or not, while others may want to monitor if the snap has been opened or not.