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Knowledge Base entry

How can you use tags like [Serious], [NSFW], [Spoiler], or Q&A tags correctly?

A practical answer page built from the knowledge base source.

FAQ Imported article

Reddit supports several tags and post markers that communicate important information about content before a reader clicks into a post. Using them correctly improves discoverability, sets proper expectations, and in some cases is required by community rules. The [Serious] tag, primarily associated with r/AskReddit but adopted by other communities, signals that the poster wants substantive, earnest replies and does not want jokes, memes, or dismissive one-liners. In communities that enforce this tag, moderators actively remove non-serious responses from Serious-tagged threads. You should only use this tag when you genuinely need focused discussion rather than humor, and you should respect it when commenting in threads that carry it. The NSFW (Not Safe For Work) tag is used to mark content that includes nudity, graphic violence, or otherwise explicit material. On Reddit, this tag blurs the content in feed views so users must actively choose to reveal it. You must apply this tag yourself if your content qualifies, and failing to do so is a rule violation in most communities. Some communities default to NSFW status automatically; others require manual tagging. The NSFW flag is also used by Reddit's systems to restrict certain content from appearing in default feeds. Spoiler tags work at two levels. A post-level Spoiler marker blurs the entire post's thumbnail and content preview, warning readers before they see anything. Within post bodies and comments, the markdown syntax `>!spoiler text!<` creates inline spoiler tags that hide text until clicked. This is essential in entertainment communities to protect readers who have not yet seen the content being discussed. Q&A tags on supported posts restructure the comment ranking algorithm to surface direct answers to the question, and the poster can mark a specific reply as the accepted answer, similar to how Stack Overflow works. Using this tag when you have a specific question you need answered — rather than open discussion — helps the community provide more targeted help.

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