What is auto-scaling in aws?

https://www.cloudzero.com/blog/aws-auto-scaling

Please find real time example for auto scaling 

You hosted your application in server, presently it hits around 100 users. May be in festival time, the page hit will around 500 users.  This is the scenario auto scaling pileup, if you configured 4 servers, in peek time it will take max server, if there hit count reduced, only minimum server will be up and running rest of the server will terminate.. 

In autoacaling case, you no need to take care manually to upscale or downscale. Based on configuration the system will automatically take care. Hope this help you.... let me know if you need more information...

AWS Auto Scaling is a service that assists organizations in supervising AWS-based software and infrastructure. The service automatically adjusts capacity to maintain steady, predictable performance at the lowest possible cost. 

AWS Auto Scaling can increase and/or decrease the capacity of AWS services to optimize costs. The service will monitor all scalable cloud services and resources related to a user’s applications. These resources may include:

• Aurora DB clusters and replicas
• Elastic Compute Cloud Auto Scaling Groups
• EC2 Spot Fleets
• Elastic Container Service (ECS) components
• Amazon Elastic Container Service
• DynamoDB global secondary indexes and tables

However, the best way to understand auto-scaling is through Amazon’s Elastic Compute Cloud (EC2) service. EC2 provides virtual servers or compute instances that you can use to host your application(s). These virtual servers are known as EC2 instances.  

An organization may have multiple instances with different specifications. Throughout the rest of this guide, we’ll focus on Amazon Auto Scaling from an EC2 context, to make the topic simpler to understand.

Hi Naresh

Please Refer Following

https://www.cloudzero.com/blog/aws-auto-scaling

Hello Naresh,

Refer below article

https://www.c-sharpcorner.com/article/implementing-auto-scaling-in-aws/