What can "Open Level" do?

I’ve been trying to find out what the “options” part does, I’ve seen that “listen” is a common thing, but there’s no description for what it means, or what other things can be done with it. I also just found out that you can put an IP address in the “Level Name” section. What else do I not know, and is not properly documented on this node?

Also how do I connect a text box to the “Level Name” option, so people can connect to a specific ip address?

What Open Level is https://docs.unrealengine.com/en-US/BlueprintAPI/Game/OpenLevel/index.html
One way to Use Open level WTF is Open Level? Unreal Blueprint - YouTube
The IP address is not necessary if your Launch game and it Starts Session then Open Level in options type listen no caps
that will Listen for clients trying to connect and will allow them to connect to the Server