Meta topic: Responses now awaiting approval?

When I submitted a reply to a thread a minute ago, I for the first time encountered the messages that my responses woule require approval from a moderator before being public. What is this and why?

Thanks!

I am not sure what is causing this! I have approved the replies, @aggarg anything changed?

The system detected that your response contained a “flagged term,” which triggered an automatic filter. I have removed one word from the monitored list, so you should not encounter this issue again. We have to maintain an aggressive list of flagged terms to effectively manage and prevent spam posts.

@aggarg I got a similar message, and I suspect for a similar reason. If my tone has degraded too much, feel free to reject the message.

Apologies - that should not happen. Let me look into and get back. I have approved your message meanwhile.