Keep the Content and the Ads Clean

As you work with online content and ads, the letters NSFW will likely show up now and then. They stand for “not suitable for work,” meaning that the content or ads in question are obscene or otherwise questionable. Unless you're looking to cater your site to a very specific adult audience, keep the site as safe for work as possible to attract the largest number of potential advertisers.

(MLA 8th Edition)