Reliability – Amazon SQS locks your messages during processing, so that multiple producers can send and multiple consumers can receive messages at the same time. 

Customization – Your queues don't have to be exactly alike—for example, you can set a default delay on a queue.
Scalability 

Availability 
Durability 
Security 

https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-benefits.html