Question

What does auto-scaling exactly mean

Answer 1

One of the most remarkable features in Amazon Web Services is when it allows you to organize and artificially stipulates on its own and spins up new problem-solving methods without requiring your involvement. It can be achieved by setting the brinks and metrics on watch.

Answer 2

Auto Scaling is a AWS service, that helps to increase the performance of your applications at low infrastructure cost.

It scales multiple AWS resources within few clicks. 

AWS Auto Scaling helps you configure scaling policies, to maintain the consistent and congruent application. It will automatically scale resources as per your needed specified while selecting the scaling strategy. Thus you can optimize the performance of your application and pay only for the resources you actually need.