As a developer you develop the application in your computer and submit the application to testing team to test the business logic of the application
You know what is going to happen now.
It may gives some errors and bugs when the testing team start running it so they are unable to test the business logic of th application.
Why this is happening? – Because testing team’s computer has got diffrent environment than the development team.
How do you create the same environment for the application irrespective of where it is running.
That is where Containerization comes in to play.
You can define the containerization:
It is a form of operating system virtualization, through which applications are run in isolated user spaces called containers, all using the same shared operating system (OS)