diff --git a/README.rst b/README.rst
index b04ad2c..9bbfbe2 100644
--- a/README.rst
+++ b/README.rst
@@ -45,8 +45,8 @@ Quick Start
       downgrade  Downgrade to previous version.
       heads      Show current available heads in migrate location.
       history    List all migrate items.
-      init       Init config file and generate migrate location.
-      init-db    Generate schema.
+      init       Init config file and generate root migrate location.
+      init-db    Generate schema and generate app migrate location.
       migrate    Generate migrate changes file.
       upgrade    Upgrade to latest version.
 
@@ -62,10 +62,10 @@ Initialization
 
     Usage: aerich init [OPTIONS]
 
-      Init config file and generate migrate location, you must exec first.
+      Init config file and generate root migrate location.
 
     Options:
-      -t, --tortoise-orm TEXT  Tortoise-ORM config module dict variable.
+      -t, --tortoise-orm TEXT  Tortoise-ORM config module dict variable, like settings.TORTOISE_ORM.
                                [required]
       --location TEXT          Migrate store location.  [default: ./migrations]
       -h, --help               Show this message and exit.
diff --git a/aerich/cli.py b/aerich/cli.py
index a304fbc..3c89a54 100644
--- a/aerich/cli.py
+++ b/aerich/cli.py
@@ -137,9 +137,9 @@ def history(ctx):
         click.secho(version, fg=Color.green)
 
 
-@cli.command(help="Init config file and generate migrate location.")
+@cli.command(help="Init config file and generate root migrate location.")
 @click.option(
-    "-t", "--tortoise-orm", required=True, help="Tortoise-ORM config module dict variable.",
+    "-t", "--tortoise-orm", required=True, help="Tortoise-ORM config module dict variable, like settings.TORTOISE_ORM.",
 )
 @click.option(
     "--location", default="./migrations", show_default=True, help="Migrate store location."
@@ -165,7 +165,7 @@ async def init(
     click.secho(f"Success generate config file {config}", fg=Color.green)
 
 
-@cli.command(help="Generate schema.")
+@cli.command(help="Generate schema and generate app migrate location.")
 @click.option(
     "--safe",
     is_flag=True,