You'll often find yourself going through a tutorial where you need to copy some code from a webpage and create a file and paste the contents onto your local machine. Your terminal has a useful tool called "pbpaste" which allows you to paste contents into a file using a standard redirect.
Use:
pbpaste > ./index.html
It is built-in with Mac
You can also use `pbcopy`, checkout https://langui.sh/2010/11/14/pbpaste-pbcopy-in-mac-os-x-or-terminal-clipboard-fun/
echo 'Hello World!' | pbcopy