Go to https://twitter.com/ and log in to your account.

Click on the "Messages" button in the top navigation bar.

Click on the "New Message" button in the top right corner.

Enter the username of the person you want to message in the "To" field.

Type your message in the "Message" field.

twitter.com

If you are looking to reach out to someone on Twitter privately, sending a direct message (DM) is the best way to do so. Direct messages are private conversations between two Twitter users, and can be used to ask questions, share information, or just have a conversation. Knowing how to send a direct message on Twitter can be useful if you want to reach out to someone without making your message public.

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