diff --git a/README.md b/README.md
index 7d1f192..5ffd0fe 100644
--- a/README.md
+++ b/README.md
@@ -24,12 +24,23 @@ Fast, safe, cost-effective DynamoDB cache backend for Django
 </p>
 
 - [django-dynamodb-cache](#django-dynamodb-cache)
+  - [Introduce](#introduce)
   - [Installation](#installation)
   - [Setup on Django](#setup-on-django)
   - [Aws credentials](#aws-credentials)
   - [Create cache table command](#create-cache-table-command)
   - [How to contribute](#how-to-contribute)
 
+## Introduce
+
+This project is a cache backend using aws dynamodb.
+
+This is compatible with the django official cache framework.
+
+Did you set the boto3 permission?
+
+Enter the django official command createcachetable and get started easily
+
 ## Installation
 
 ```sh
@@ -51,16 +62,18 @@ INSTALLED_APPS = [
 CACHES = {
     "default": {
         "BACKEND": "django_dynamodb_cache.backend.DjangoCacheBackend",
-        "LOCATION": "table-name",  # default: django-dynamodb-cache
-        "TIMEOUT": 120,  # seconds
-        "KEY_PREFIX": "django_dynamodb_cache",
-        "VERSION": 1,
-        "KEY_FUNCTION": "path.to.function",  # f"{prefix}:{key}:{version}"
+        "LOCATION": "table-name",                  # (mandatory)
+        "TIMEOUT": 120,                            # (optional) seconds
+        "KEY_PREFIX": "django_dynamodb_cache",     # (optional)
+        "VERSION": 1,                              # (optional)
+        "KEY_FUNCTION": "path.to.function",        # (optional) f"{prefix}:{key}:{version}"
         "OPTIONS": {
-            "aws_region_name": "us-east-1",
-            "read_capacity_units": 1,
-            "write_capacity_units": 1,
-            "encode": "django_dynamodb_cache.encode.PickleEncode"
+            "aws_region_name": "us-east-1",        # (optional)
+            "aws_access_key_id": "us-east-1",      # (optional)
+            "aws_secret_access_key": "us-east-1",  # (optional)
+            "read_capacity_units": 1,              # (optional)
+            "write_capacity_units": 1,             # (optional)
+            "encode": "django_dynamodb_cache.encode.PickleEncode"  # (optional)
         }
     }
 }