I am Creating a Droplet for Forum. I saw a tutorial on Youtube. so, it is Necessary to select a Discourse? Because at Domain I want to host any other site which is not related to discourse.
I don’t understand your question. Make sure that you are doing Discourse official Standard Installation…
You do want a subdomain, even www. You do not need to use the word discourse at the subdomain.
I Know but I am asking that while creating a droplet i should select discourse from marketplace?
No you should not. You should strictly follow what is written in Discourse official Standard Installation.