diff --git a/content/features/_index.md b/content/features/_index.md
index 7eb2c98..747bcc0 100644
--- a/content/features/_index.md
+++ b/content/features/_index.md
@@ -18,3 +18,4 @@ This section covers the features and improvements that have been added to Sable
 - [UI Improvements](ui-improvements) — A collection of quality-of-life improvements across the whole app.
 - [Presence](presence) — Control whether your online/away status is shared with others.
 - [Developer Tools](developer-tools) — Internal debug log viewer and in-app bug report command.
+- [Message Bookmarks](bookmarks) — Save messages for later and access them from the bookmarks sidebar page, synced across devices. *(Experimental — MSC4438)*
diff --git a/content/features/bookmarks.md b/content/features/bookmarks.md
new file mode 100644
index 0000000..f2811a4
--- /dev/null
+++ b/content/features/bookmarks.md
@@ -0,0 +1,37 @@
++++
+title = "Message Bookmarks"
+weight = 10
++++
+
+> **Experimental feature** — Enable via **Settings → Experimental → Message Bookmarks (MSC4438)**.
+
+Bookmarks let you save individual messages for later reference. Saved bookmarks appear in a dedicated **Bookmarks** page in the sidebar and sync automatically across all your devices.
+
+This feature implements [MSC4438](https://github.com/matrix-org/matrix-spec-proposals/pull/4438). See the [tracking issue](https://github.com/SableClient/Sable/issues/600) for known limitations and progress.
+
+# Bookmarking a Message
+
+Hover over any message and open the message menu (the **⋮** button). Select **Bookmark Message**. The menu item toggles, so selecting it again on an already-bookmarked message removes the bookmark.
+
+# The Bookmarks Page
+
+Click **Bookmarks** in the left sidebar (under Message Search) to open the bookmarks list.
+
+Each bookmark shows:
+
+- The sender's avatar and display name
+- The room the message came from
+- A preview of the message content
+- The timestamp of the original message
+
+Use the **Filter** box at the top to search bookmarks by message text, room name, or sender.
+
+Click **Jump** on any bookmark to navigate directly to that message in its room.
+
+Click the **trash** icon to remove a bookmark (a confirmation dialog will appear).
+
+# Sync Across Devices
+
+Bookmarks are stored in your Matrix account data, so they are available on any device you log in to with your account. Changes (adding or removing a bookmark) propagate to other devices automatically via your homeserver.
+
+> **Privacy note:** Bookmark metadata including a short message preview is stored as unencrypted account data on your homeserver, regardless of whether the original room is encrypted. This is a known limitation of the current MSC — see [MSC4438](https://github.com/matrix-org/matrix-spec-proposals/pull/4438) for the ongoing spec discussion.