Hello!
In Mozbar, optimization factors
"Avoid Keyword Stuffing in Document"
If a blog (or any other page) publishes an article, and that article attracts a considerable number of questions, it is inevitable to prevent repeating the keyword on that page. In other words, using keywords by users in comments should not be considered as "Keyword Stuffing". In my view, if this is true, you need to optimize the detection of "Keyword Stuffing".
By the way, thanks for the valuable service and tools for SEO.
Best regards,
Abbas
