diff --git a/kkkmeet-server.el b/kkkmeet-server.el
index b9fd29a..d3518e3 100644
--- a/kkkmeet-server.el
+++ b/kkkmeet-server.el
@@ -180,19 +180,21 @@ When KEEP-OPEN is nil, close PROCESS after writing."
 (defun kkkmeet-server--remove-peer (process)
   "Remove PROCESS from its room and notify remaining peers."
   (let ((room-id (process-get process :kkkmeet-room-id))
-        (peer-id (process-get process :kkkmeet-peer-id)))
+        (peer-id (process-get process :kkkmeet-peer-id))
+        (name (or (process-get process :kkkmeet-name) "A participant")))
     (when (and room-id peer-id)
       (let ((room (gethash room-id kkkmeet-server--rooms)))
         (when room
           (remhash peer-id room)
           (kkkmeet-server--broadcast
-           room-id peer-id `((type . "peer-left") (peerId . ,peer-id)))
+           room-id peer-id `((type . "peer-left") (peerId . ,peer-id) (name . ,name)))
           (when (equal (alist-get 'peerId (gethash room-id kkkmeet-server--presentation-states))
                        peer-id)
             (remhash room-id kkkmeet-server--presentation-states)
             (kkkmeet-server--broadcast
              room-id peer-id `((type . "presentation-state")
                                (from . ,peer-id)
+                               (name . ,name)
                                (sharing . :false))))
           (when (= (hash-table-count room) 0)
             (remhash room-id kkkmeet-server--rooms)
diff --git a/public/app.js b/public/app.js
index 2064388..15a2ce3 100644
--- a/public/app.js
+++ b/public/app.js
@@ -10,6 +10,7 @@ const nameDialogSubmit = document.querySelector("#name-dialog-submit");
 const initialNameForm = document.querySelector("#initial-name-form");
 const initialNameInput = document.querySelector("#initial-name-input");
 const statusText = document.querySelector("#status");
+const activityStatusText = document.querySelector("#activity-status");
 const youtubeForm = document.querySelector("#youtube-form");
 const youtubeInput = document.querySelector("#youtube-input");
 const youtubeShell = document.querySelector("#youtube-shell");
@@ -73,6 +74,7 @@ let youtubeReadyResolvers = [];
 let watchApplySequence = 0;
 let youtubePlaybackRequestId = 0;
 let watchPlaylist = [];
+let remoteParticipantCount = 0;
 const peers = new Map();
 
 function persistentClientId() {
@@ -133,6 +135,26 @@ function setStatus(message) {
   statusText.textContent = message;
 }
 
+function participantDisplayName(name, fallback = "Someone") {
+  return normalizeName(String(name || "")) || fallback;
+}
+
+function setSessionSummary() {
+  if (!peerId) {
+    setStatus(displayName ? `Ready as ${displayName}.` : "Enter your name to join the call.");
+    return;
+  }
+  const suffix = remoteParticipantCount === 1 ? "participant" : "participants";
+  setStatus(`You are ${displayName}. ${remoteParticipantCount} other ${suffix}.`);
+}
+
+function setActivity(name, action) {
+  const actor = participantDisplayName(name);
+  const message = `${actor} ${action}`;
+  activityStatusText.textContent = message;
+  console.info(`[kkkmeet activity] ${message}`);
+}
+
 function normalizeName(name) {
   return name.trim().replace(/\s+/g, " ").slice(0, 48);
 }
@@ -177,6 +199,7 @@ function setDisplayName(nextName) {
   displayName = normalizeName(nextName);
   localStorage.setItem(nameStorageKey, displayName);
   localNameLabel.textContent = displayName ? `${displayName} (you)` : "You";
+  setSessionSummary();
 }
 
 function openNameDialog(mode) {
@@ -528,6 +551,7 @@ async function sendWatchState({
       updatedAt: Date.now()
     })
   });
+  setActivity(displayName, "synced YouTube playback.");
 }
 
 function currentWatchState(playing) {
@@ -1150,7 +1174,9 @@ async function answerPeer(message) {
 async function handleSignal(message) {
   if (message.type === "welcome") {
     peerId = message.peerId;
-    setStatus(`Joined the call as ${displayName}. ${message.peers.length} other participant(s).`);
+    remoteParticipantCount = message.peers.length;
+    setSessionSummary();
+    setActivity(displayName, "joined.");
     if (message.watchState) {
       const watchShouldPlay = message.watchState.action === "play" ||
         (!message.watchState.action && Boolean(message.watchState.playing));
@@ -1175,13 +1201,20 @@ async function handleSignal(message) {
   if (message.type === "peer-joined") {
     updateRemoteLabel(message.peerId, message.name);
     announceParticipantJoined(message.name);
-    setStatus(`${message.name || "A participant"} joined.`);
+    remoteParticipantCount += 1;
+    setSessionSummary();
+    setActivity(message.name, "joined.");
     return;
   }
 
   if (message.type === "peer-left") {
+    const peerName = message.name ||
+      peers.get(message.peerId)?.name ||
+      `Participant ${message.peerId?.slice(0, 4) || ""}`.trim();
     closePeer(message.peerId);
-    setStatus("A participant left.");
+    remoteParticipantCount = Math.max(0, remoteParticipantCount - 1);
+    setSessionSummary();
+    setActivity(peerName, "left.");
     return;
   }
 
@@ -1197,21 +1230,22 @@ async function handleSignal(message) {
       allowJoinedYoutubeStartPrompt = false;
     }
     await applyWatchState(message, { allowStartPrompt });
-    setStatus(`${message.name || "Someone"} synced YouTube playback.`);
+    setActivity(message.name, "synced YouTube playback.");
     return;
   }
 
   if (message.type === "presentation-state") {
     setRemotePresentation(message.from, message.sharing, message.name);
-    setStatus(message.sharing
-      ? `${message.name || "Someone"} is sharing their screen.`
-      : `${message.name || "Someone"} stopped sharing their screen.`);
+    setActivity(
+      message.name,
+      message.sharing ? "started sharing their screen." : "stopped sharing their screen."
+    );
     return;
   }
 
   if (message.type === "voice-announcement") {
     speakAnnouncement(message);
-    setStatus(`${message.name || "Someone"} sent an announcement.`);
+    setActivity(message.name, "sent an announcement.");
     return;
   }
 
@@ -1260,8 +1294,9 @@ function leaveCall() {
   events?.close();
   events = undefined;
   peerId = "";
+  remoteParticipantCount = 0;
   for (const remotePeerId of peers.keys()) closePeer(remotePeerId);
-  setStatus(displayName ? `Ready as ${displayName}.` : "Enter your name to join the call.");
+  setSessionSummary();
 }
 
 function setTrackEnabled(kind, enabled) {
@@ -1356,7 +1391,7 @@ async function sendVoiceAnnouncement(text) {
 
   await sendRoomEvent({ type: "voice-announcement", text: announcementText });
   speakAnnouncement({ text: announcementText });
-  setStatus("Announcement sent.");
+  setActivity(displayName, "sent an announcement.");
 }
 
 async function startScreenShare() {
@@ -1368,6 +1403,7 @@ async function startScreenShare() {
   await replaceOutboundVideoTrack(screenTrack);
   shareButton.textContent = "Stop Sharing";
   await sendRoomEvent({ type: "presentation-state", sharing: true });
+  setActivity(displayName, "started sharing their screen.");
 
   screenTrack.onended = () => {
     stopScreenShare().catch((error) => {
@@ -1389,6 +1425,7 @@ async function stopScreenShare() {
   }
   shareButton.textContent = "Share Screen";
   await sendRoomEvent({ type: "presentation-state", sharing: false });
+  setActivity(displayName, "stopped sharing their screen.");
 }
 
 initialNameForm.addEventListener("submit", (event) => {
diff --git a/public/index.html b/public/index.html
index 4bc51d7..7031314 100644
--- a/public/index.html
+++ b/public/index.html
@@ -12,6 +12,7 @@
         <div>
           <h1>kkkmeet</h1>
           <p id="status">Enter your name to join the call.</p>
+          <p id="activity-status" aria-live="polite"></p>
         </div>
         <button id="rename-button" type="button">Rename</button>
       </header>
diff --git a/public/styles.css b/public/styles.css
index 4c84c4d..2314547 100644
--- a/public/styles.css
+++ b/public/styles.css
@@ -62,6 +62,13 @@ h1 {
   font-size: 14px;
 }
 
+#activity-status {
+  min-height: 18px;
+  margin-top: 3px;
+  color: #d5dbe3;
+  font-size: 13px;
+}
+
 #rename-button {
   min-width: 92px;
 }
diff --git a/server.js b/server.js
index 5a72c48..1b6b9e4 100644
--- a/server.js
+++ b/server.js
@@ -84,11 +84,13 @@ function removePeer(roomId, peerId) {
   const room = rooms.get(roomId);
   if (!room) return;
 
+  const peer = room.get(peerId);
+  const name = peer?.name || "A participant";
   room.delete(peerId);
-  broadcast(roomId, peerId, { type: "peer-left", peerId });
+  broadcast(roomId, peerId, { type: "peer-left", peerId, name });
   if (presentationStates.get(roomId)?.peerId === peerId) {
     presentationStates.delete(roomId);
-    broadcast(roomId, peerId, { type: "presentation-state", from: peerId, sharing: false });
+    broadcast(roomId, peerId, { type: "presentation-state", from: peerId, name, sharing: false });
   }
 
   if (room.size === 0) {