MOTD also known as Message of The Day was created to give you and your places a central place to view important server links. Some good examples of links would be forums, discord, server store, server rules, CAD/MDT, etc.
You can configure this resource to open on player spawns, commands, or both. You can also customize all the links, icons, and text.
If you have some CSS experience you can also edit the style such as colors, fonts, and more!
Limitation: There is a limitation where URLs need to be HTTPS and allow iFrame embedding.