It's never appropriate here. > Please don't use uppercase for emphasis. If you want to emphasize a word or phrase, put *asterisks* around it and it will get it

It's never appropriate here. > Please don't use uppercase for emphasis. If you want to emphasize a word or phrase, put *asterisks* around it and it will get italicized. https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html Of course, uppercase is appropriate for an acronym or initialism that actually is spelled that way, such as SEO in the comment we're replying to.