The server region settings changes where your server shows in the server browser, you can change this fairly often.
This particular setting is a text field so you can type for example: ServerMessageOfTheDay=Welcome to the greatest Conan Server in the World!
To edit this, navigate to your configuration files and edit 'ServerSettings.ini' either find the line beginning 'ServerMessageOfTheDay=' or hit CTRL + F and type it in - once found simply edit away and save the config.
Keep an eye on our blog as this will talk about any new Conan Exiles server features available to you! https://low.ms/blog
If you haven't given us a try, we believe you won't be disappointed! Here is a link to our Conan Exiles Server Hosting page: https://low.ms/game-servers/conan-exiles