The demand for mirror sites stems heavily from digital censorship and regional internet filters.
Before diving deeper into mirrors, it is crucial to emphasize that the official AO3 website— https://archiveofourown.org/ —is the only site operated directly by the OTW. All user accounts, personal data, saved works, reading histories, comments, and kudos are stored exclusively on the official site. Any interaction requiring authentication—logging in, posting new works, editing existing content, leaving comments, or updating profile information—must be performed on the official domain.