What exactly is considered 'NSFW' on Steemit and how does it work?

[carneage]

Why I ask this is cause I recently uploaded this post on steemit and want to know what exactly is considered nsfw and how it works.

https://steemit.com/entertainment/@carneage/just-a-little-or-a-lot-fan-service-is-here-to-stay-nsfw-i-think

Tell me what you think?