A long long time ago I wrote about
While screen has been helping sharing terminals with colleagues or clients for many years,
tmux is the alternative that can apparently achieve more.
You can refer to https://tmuxcheatsheet.com/ for all the useful tips.
My (very) basic usage of tmux is to split the screen when I need to work on anything else than my workstation (on which I run
terminator that can split terminals).
Also a big difference is that the split happens on the server with
tmux while it happens on your workstation with
Ctrl+B % will split vertically
Ctrl+B left arrow will go to the left terminal
Ctrl+B right arrow will go... to the right.
Ctrl+B C creates a new window
Ctrl+B n goes to the next window
Refer to the cheat sheet for more shortcuts!