It has been unclear to many people what Facebook does not allow to post. Although the company said their policy is still the same but they have just made it clearer and list down everything which cannot be posted.
Facebook’s policies are not changing. The updates to the Community Standards simply provides more detail on the policies and examples of what is not acceptable.
Facebook’s Community Standards are broken into four sections: helping keep you safe, encouraging respective behavior, keeping your account and personal information secure and protecting your intellectual property. If you notice that that a Page or profile posted content that violates the Community Standards, it can be reported by clicking on the “Report” link at the arrow in the top right-hand corner of the post. You can also unfollow, block or hide content from Pages or people you don’t want to see.
According to the head of content policy Facebook’s head of global policy management Monika Bickert in a blog post; she clarified what constitutes nudity (genitals, fully exposed buttocks and female breasts if they include the nipple -- except if the women are breastfeeding or showing post-mastectomy scars).
Nude illustrations are fine, as long as they're for educational or satirical purposes and aren't "explicit." And so-called revenge porn, in which someone posts sexual images of another person without permission, is not allowed.
Hate speech has been another tricky topic for Facebook. The company said attacks on race, ethnicity, national origin, religion, sexual orientation, gender and "serious" disabilities are banned.
So now onwards Kim Kardashian will not be able to break the internet with a photo shoot of her derriere in future or anyone else has to be more careful why posting anything on Facebook. The step taken by Facebook is good and will save many from falling into depression etc.