Posts in Discord's large public servers are about to become readable by anyone with a search engine, and the privacy setting that controls it is on unless you switch it off.
The change covers Discoverable Servers, the public tier of Discord. These servers have at least 1,000 members and no invite link, so anyone with a Discord account can find and join them. On November 16, Discord will launch web pages for each one, showing summaries of discussions in public channels plus some individual messages. By mid-December, those pages may start appearing in search results. Discord said messages will not be tied to a username or avatar, and that private servers and DMs stay private.
The opt-out controls are uneven. Server admins can pick which channels appear, or exclude all of them, under Server Settings > Web Presence. Members get a single toggle under User Settings > Data and Privacy, and it applies to every discoverable server at once. Nobody can opt out of having their messages folded into channel summaries. Messages sent before mid-December are excluded regardless. After that date, anything sent while the setting was on stays up after you turn it off, unless you delete the message from Discord entirely.
This is the Reddit model arriving at a chat app. Forums and Reddit threads have long been indexed by search engines, which is much of why they surface in answers to obscure questions. Discord, by contrast, has kept even its public conversations behind a login. Opening them up makes the content more useful to outsiders, but it also changes what posting in a big server means. A message written for a room of strangers is now written for the open web.
Stripping usernames helps, but it is not anonymity. A distinctive message about a job, a town or a bug can still point to its author. The open question is how many admins will review their channel settings before November 16, since the default decides what most people's posts end up doing.