diff --git a/scripts/install b/scripts/install
index cae7881..6c5ba9f 100644
--- a/scripts/install
+++ b/scripts/install
@@ -29,6 +29,18 @@ domain=$YNH_APP_ARG_DOMAIN
 password=$YNH_APP_ARG_PASSWORD
 nextcloud_domain=$YNH_APP_ARG_NEXTCLOUDDOMAIN
 
+### If it's a multi-instance app, meaning it can be installed several times independently
+### The id of the app as stated in the manifest is available as $YNH_APP_ID
+### The instance number is available as $YNH_APP_INSTANCE_NUMBER (equals "1", "2", ...)
+### The app instance name is available as $YNH_APP_INSTANCE_NAME
+###    - the first time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample
+###    - the second time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample__2
+###    - ynhexample__{N} for the subsequent installations, with N=3,4, ...
+### The app instance name is probably what interests you most, since this is
+### guaranteed to be unique. This is a good unique identifier to define installation path,
+### db names, ...
+app=$YNH_APP_INSTANCE_NAME
+
 #=================================================
 # CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
 #=================================================