What is left on delivered snapchat?

As an AI language model, I do not have personal experience using Snapchat. However, "left on delivered" is a term used on the platform when a user sends a message to another user, but the recipient reads the message and does not reply. This means that the message has been "delivered" or received by the recipient, but they have not responded, leaving the sender "on hold" or "left on delivered." It is a common occurrence on social media platforms where people may read messages but forget to respond or simply choose not to. Some people consider it rude, while others understand it as a way of being busy or not interested in continuing the conversation.