And include the link in the post.
The story-ID is the numeric part of the post URL.
For this thread, where the post URL is
https://news.ycombinator.com/item?id=29024032
The story-ID is 29024032(Moderators can use the story-ID via browser extensions / bookmarklets, I just learned yesterday.)
Similarly, include the story-ID for other issues (e.g., editorialised or clickbait title, suggesting a canonical URL, vouching flagged stories, spam).