The question: Port 80 instead of 443? Why would you ever need to use both of them? was closed. A comment suggest to ask this question on other groups typically groups of system admins.
I agree this is rather a beginner question. But I am also convinced that this is a professional question relevant of the skillness of network engineers.
In my company, system admins aren't good at answering this question. They often fail in choosing the right protocol to use. The engineers who answer correctly to this kind of question are network engineers or engineers in charge of the operational security.
Then I suggest to keep this question open since many questions on the same topic will be legitimately closed on any other group. These questions will receive a suggestion to be posted on the specialists group which is here (Network Engineering) 😊. Just because it is a question about the appropriate network protocol to use.