There is often the desire to start "standard" or pre-configured workspaces in tmux.
For example, run tail on two log files in a pane, or to start both vim and mysql in a pane, etc.

If you try to find information about starting tmux workspaces, you typically get advised to use wrapper programs such as tmuxinator, tmux-resurrect, or tmux-continuum. These programs may be great, but the article proposes a simpler approach.

I personally like this approach.