An alias is running another command with the input of whatever the message field of the new command is. So the aliased command needs to exist.
You can also use an alias to have two commands with different names but the same common message (and if you edit the original, all aliases match that one without needing to be touched), in that case it needs a command to know what it should say.
So, what exactly are you needing to do? If you have a specific situation or commands i can try to help out/help you understand.
OK I’m new to these bots and in Moobot for example, you simply set the alias to point to the main command. I’m just not sure how to configure one command but with an alias in Nightbot. So yes, it would have the same common message.
So for example, if I want a command !yt with the common message being a url to youtube, but I would like an alias of !youtube also - what would I put in the box at the bottom of the command, the alias box?
Basically decide which command you want to be the base command: let’s assume !youtube (generally aliases are to make command names shorter). My commands and screenshot will show the adding of a base command and the aliasing of it with another command through chat, you can do it through the nightbot panel as well.