Message Board was available for users to post messages that are available to other Wii users by usage of Wii Numbers with WiiConnect24. In addition to writing text, players can also include images from an SD card in the body of messages, as well as attaching a Mii to the message.
This feature of the Wii system allowed users to connect with each other through a message board service that integrated with WiiConnect24 and enabled sharing of multimedia content like images and Mii avatars.