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# SNS

## SNS (Simple Notification Service)

A notification service generally used in conjunction with CloudWatch to email or text alerts when some event occurs in account

What is it? Sending email or text message notifications, based on events in your AWS account.

Two types of clients:

* publishers
* subscribers

### How to use

* create topic
* create subscription

### Basic components

* Topics
  * how you label and group different endpoints that you send messages to
* Subscriptions
  * the endpoints that a topic sends messages to  (i.e. email address or phone number of our system admin)

### [Pricing](https://aws.amazon.com/sns/pricing/)

Free tier available.

* Publishes
  * number of SNS request (message that needs to be sent)
* Notification Deliveries
  * number of subscribers   the message is sent to
* Data transfer in/out of SNS