Explain better what GDPR-erased means (#8189)

Fixes https://github.com/matrix-org/synapse/issues/8185

2 files changed, 6 insertions, 3 deletions

diff --git a/changelog.d/8189.doc b/changelog.d/8189.doc
new file mode 100644

index 0000000000..800ff89dc5
--- /dev/null
+++ b/changelog.d/8189.doc
@@ -0,0 +1 @@
+Explain better what GDPR-erased means when deactivating a user.
diff --git a/docs/admin_api/user_admin_api.rst b/docs/admin_api/user_admin_api.rst

index d6e3194cda..e21c78a9c6 100644
--- a/docs/admin_api/user_admin_api.rst
+++ b/docs/admin_api/user_admin_api.rst
@@ -214,9 +214,11 @@ Deactivate Account
 
 This API deactivates an account. It removes active access tokens, resets the
 password, and deletes third-party IDs (to prevent the user requesting a
-password reset). It can also mark the user as GDPR-erased (stopping their data
-from distributed further, and deleting it entirely if there are no other
-references to it).
+password reset).
+
+It can also mark the user as GDPR-erased. This means messages sent by the
+user will still be visible by anyone that was in the room when these messages
+were sent, but hidden from users joining the room afterwards.
 
 The api is::