This document discusses the evolving role of headers, tags, and warnings in fanfiction communities. It explores how tags have developed from basic descriptions to become a creative meta-language for commentary, organization, and community engagement. Tags are now used across platforms like AO3, Tumblr and Twitter as both practical metadata and artistic fanworks in their own right. Proper tagging allows fans to appreciate works while avoiding unwanted topics, and intra-fandom discussions have led to some tags becoming canonical references within fan communities.