The MOTD is what you will first in chat when connectiong to your server, this can be used to give your players some information about the server when they connect.
1 Login to the Kinetic Panel
2 Head to the file manager.
3 Click on the Server folder.
4 Now, open the Rust folder.
5 Open the cfg folder.
6 Now, open the serverauto.cfg file.
7 Navigate the configuration files until you find "server.motd"
8 Within this, you will enter the information you would like displayed between the "".
9 From there, you can start your rust server.