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@ -20,9 +20,28 @@ messages from any given date and day-by-day navigation.
## How do I opt out and keep my room from being indexed by search engines?
All public Matrix rooms are accessible to view in the Matrix Public Archive. But only
rooms with history visibility set to `world_readable` will be indexed by search engines.
rooms with history visibility set to `world_readable` are indexable by search engines.
Also see https://github.com/matrix-org/matrix-public-archive/issues/47
Also see https://github.com/matrix-org/matrix-public-archive/issues/47 to track better
opt out controls.
For [archive.matrix.org](https://archive.matrix.org/), you can ban the
`@archive:matrix.org` user if you don't want your room content to be shown in the
archive at all.
## Why does the archive user join rooms instead of browsing them as a guest?
Guests require `m.room.guest_access` to access a room. Most public rooms do not allow
guests because even the `public_chat` preset when creating a room does not allow guest
access. Not being able to view most public rooms is the major blocker on being able to
use guest access. The idea is if I can view the messages from a Matrix client as a
random user, I should also be able to see the messages in the archive.
Keep in mind that only rooms with history visibility set to `world_readable` are
indexable by search engines. The Matrix Public Archive doesn't hold onto any data (it's
stateless) and requests the messages from the homeserver every time. The
[archive.matrix.org](https://archive.matrix.org/) instance has some caching in place, 5
minutes for the current day, and 2 days for past content.
## Technical details