Improve module documentation

README.md

@@ -3,9 +3,14 @@
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-AWS SNS Application Module
-
-This module is designed to be used with `DNXLabs/terraform-aws-monitoring`.
+This is a module that creates an AWS SNS Application Module and it was designed to be used with `DNXLabs/terraform-aws-monitoring`.
+
+The following resources will be created:
+
+ - Simple Notification Services (SNS) topic
+ - Provides a Lambda Function resource. Lambda allows you to trigger execution of code in response to events in AWS, enabling serverless backend solutions. 
+ - Gives an external source (like a CloudWatch Event Rule, SNS, or S3) permission to access the Lambda function. In our case is SNS
+ - An SNS topic policy resource
 
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