To respond to a message on Instagram, follow these steps: After receiving a message, open the Instagram app on your device. Locate the specific message you want to reply to in your direct messages. Once you’ve found the message, tap on it to open the conversation. At the bottom of the screen, you’ll see a text box where you can type your reply. Simply type your response in the text box and then press the send button, usually represented by an arrow icon. Your reply will be sent, and the conversation will continue. That’s how to reply to a message on Instagram. Remember to keep your interactions respectful and considerate in the Instagram community.