What is the best way to add css, inline or external and Why?

[vidushi-tomar-7f335103 (Vidushi Tomar)]

Confused in the best and efficient way to add CSS.

[vivek-pandey-2082921b (vivek pandey)]

It depends if the project is quite big then the best option will be to use external where as if you are creating a simple landing page internal will be best but if you’re just learning elements tags in html inline will be best.