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Not suitable/safe for work (NSFW) is Internet slang or shorthand. Typically, the NSFW tag is used in e-mail, videos, and on interactive discussion areas (such as Internet forums, blogs, or community websites) to mark URLs or hyperlinks which contain material such as nudity, violence, pornography or profanity, which the viewer may not want to be seen accessing in a public or formal setting such as at work.
Determining a site to be NSFW is invariably subjective, and poses challenges for academics who study sexuality. The difficulty in identifying such content objectively has led to the creation of online tools to help individuals to identify NSFW content:
NSFW has particular relevance for individuals making personal use of the Internet at workplaces or schools which have policies prohibiting (even inadvertent) access to sexually provocative content. Companies and schools frequently adopt such policies because they regard the presence of sexual content as a misuse of company property (or education resources) and, potentially, a violation of sexual harassment policy.