diff --git a/doc/user/preface.xml b/doc/user/preface.xml
index b0d37a00c86ffe8d4b5eaf58f18213ffb7e30fff..8a66a992505840b99f41492753b5bcba284d4f6a 100644
--- a/doc/user/preface.xml
+++ b/doc/user/preface.xml
@@ -67,6 +67,14 @@
     under 10%.
   </para>
 
+  <para>
+    The key feature of Tarantool is <emphasis role="strong">support
+    for stored procedures</emphasis>, which
+    can access and modify data atomically. With stored procedures,
+    it's possible to turn Tarantool into a highly
+    flexible and extremely fast social web application server.
+  </para>
+
   <para>
     <emphasis role="strong">The software is production-ready</emphasis>.
     Tarantool has been developed and is actively used at