In Gmail, the outbox is a designated folder where outgoing messages are stored before they are sent. It is a temporary holding area where messages that youve sent, but havent yet been delivered, are stored. If you hit "send" and your email isnt going through, itll stay in your outbox until it can be delivered. The outbox is important because it stores messages that havent been sent yet. This means that if theres an issue with delivery, the message will stay in your outbox until the problem is fixed. For example, an email may stay in your outbox because the file or video you’re trying to send is too large. If you are experiencing issues with emails getting stuck in your Gmail outbox, there are several ways to fix it, such as checking your internet connection, attachment size, and disabling offline mode.