Okay, so I’ve seen some conflicting information flying around since the announcement literally an hour ago about tumblr’s new policy.
Fandom content will be affected, first of all. Here’s a direct quote from the new TOS. Bold is mine.
What is considered adult content?
Adult content primarily includes photos, videos, or GIFs that show real-life human genitals or female-presenting nipples, and any content—including photos, videos, GIFs and illustrations—that depicts sex acts.
What is still permitted?
Examples of exceptions that are still permitted are exposed female-presenting nipples in connection with breastfeeding, birth or after-birth moments, and health-related situations, such as post-mastectomy or gender confirmation surgery. Written content such as erotica, nudity related to political or newsworthy speech, and nudity found in art, such as sculptures and illustrations, are also stuff that can be freely posted on Tumblr.
So what does this all mean? TL;DR:
1). N/SFW fanfic will still be allowed, for now.
2). N/SFW fanart will NOT be allowed.
3.) If you tag something as N/SFW (etc), no one will see it in search.