Final answer:
Discord desktop notifications show messages from other users that you receive, not the ones you send. This is to alert you to new messages and maintain focus on incoming information.
Step-by-step explanation:
Discord desktop notifications typically show only the messages you receive and not the ones you send. So the answer to the question is true. When you get a new message on Discord, a notification pops up to alert you, which includes the sender's name and the message content. However, it does not show the messages that you have sent. The notifications are designed to inform you about new messages incoming from other users, not to display an ongoing conversation. This helps to maintain focus on the new information arriving and not what you have already contributed to the conversation.