diff --git a/README.md b/README.md
index dfdb2a3a9c1ad577366857b63f4b8be34ae1d360..5f348b8210b2e967cf87e437fd7329fb1da57b68 100644
--- a/README.md
+++ b/README.md
@@ -17,41 +17,41 @@ This module install a mailing list server named [Sympa](https://www.sympa.commun
 
 ## Setup
 
-### What sympa affects **OPTIONAL**
+### What sympa affects
 
-If it's obvious what your module touches, you can skip this section. For
-example, folks can probably figure out that your mysql_instance module affects
-their MySQL instances.
+With `manage_user` at true the module creates a local account on system.
 
-If there's more that they should know about, though, this is the place to
-mention:
+With `manage_database` at true the module installs a PostgreSQL database server and database with role.
 
-* Files, packages, services, or operations that the module will alter, impact,
-  or execute.
-* Dependencies that your module automatically installs.
-* Warnings or other important notices.
-
-### Setup Requirements **OPTIONAL**
+### Setup Requirements
 
 As a web app, you have to configure a web server. To do so with Puppet, it is possible to use :
  * [puppetlabs-apache](https://forge.puppet.com/modules/puppetlabs/apache/readme)
  * [puppet-nginx](https://forge.puppet.com/modules/puppet/nginx/readme)
 
-As backend, PostgreSQL or MySQL/MariaDB are supported. With Puppet, it is possible to use :
- * [puppetlabs-postgresql](https://forge.puppet.com/modules/puppetlabs/postgresql/readme).
- * [puppetlabs-mysql](https://forge.puppet.com/modules/puppetlabs/mysql/readme).
 
 ### Beginning with sympa
 
-The very basic steps can be simple `include sympa`.
+The very basic steps can be simple :
+
+`include sympa`
+
+But it's better to change `db_password` at least.
 
 ## Usage
 
-Include usage examples for common use cases in the **Usage** section. Show your
-users how to use your module to solve problems, and be sure to include code
-examples. Include three to five examples of the most important or common tasks a
-user can accomplish with your module. Show users how to accomplish more complex
-tasks that involve different types, classes, and functions working in tandem.
+To customize topics :
+
+```
+class { 'sympa':
+  topics => {
+    'topic1' => {
+      'en' => 'Topic one in English',
+      'fr' => 'Cathégorie une en Français',
+    },
+  },
+}
+```
 
 ## Reference
 
@@ -61,6 +61,8 @@ Details are in [REFERENCE.md](https://gitlab.adullact.net/adullact/puppet-sympa/
 
 Supported OSes are given in [metadata.json](https://gitlab.adullact.net/adullact/puppet-sympa/-/blob/main/metadata.json) file.
 
+This module support only PostgreSQL as backend.
+
 ## Development
 
 Home at URL https://gitlab.adullact.net/adullact/puppet-sympa