It means it has 0 replies. The way the comments work is that the one above is the “parent” and the one’s below are “children”. Sometimes you see people using terminology such as “grand-parent” and “great grand-parent” to refer to posts further above.
Means no one replied to the comment. Normally this is implicit in the number of comments nested under it, but since those aren’t shown when comments are downvoted below the threshold, the site provides the number of child comments as a convenience.
And, question: What does 0 children mean? It’s on the comments which were down-voted a lot and not shown.
It means it has 0 replies. The way the comments work is that the one above is the “parent” and the one’s below are “children”. Sometimes you see people using terminology such as “grand-parent” and “great grand-parent” to refer to posts further above.
Means no one replied to the comment. Normally this is implicit in the number of comments nested under it, but since those aren’t shown when comments are downvoted below the threshold, the site provides the number of child comments as a convenience.
If the downvoted comment had, e.g. 5 total replies to it, it would say “5 children”.