diff --git a/README.md b/README.md
index bca8005..b9c3b1f 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,9 @@ If you don't have YunoHost, please consult [the guide](https://yunohost.org/#/in
 
 ## Overview
 
-This is a dummy description of this app features
+A puppeting bridge between Matrix and Discord packaged as a YunoHost service. Messages, media and notifications are bridged between a Discord user and a matrix user. The "Mautrix-Discord" bridge consists in a synapse app service and relies on postgresql (mysql also available). Therefore, Synapse for YunoHost should be installed beforehand.
+
+**Attention: always backup and restore the Yunohost matrix_synapse et mautrix_discord apps together!**
 
 
 **Shipped version:** 0.6.4~ynh1