Had to “google” it: Found this in Wikipedia: 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, pornography or profanity, which the viewer may not want to be seen accessing in a public or formal setting such as at work.
Had to “google” it: Found this in Wikipedia: 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, pornography or profanity, which the viewer may not want to be seen accessing in a public or formal setting such as at work.