Some things you do repeatedly from a *nix shell are incredibly useful and time-saving that you do them without thinking about it. Say for example you need to add a file or directory name to a file like .gitignore. On Windows you might open an editor and add the new lines to the end of the file and save it, but in a *nix shell (I imagine there’s a comparable approach maybe using something like Windows Powershell too), you can do:
echo "newfile" >> .gitignore
and you’re done.