Blue Green Deployment is a technique used to minimize downtime and risk when releasing a new version of an application. With Blue Green Deployment, you have two identical production environments, referred to as "blue" and "green." At any given time, only one of these environments is live and serving user traffic, while the other remains idle. When a new version of the software is ready to be deployed, it is released to the idle environment. Once the new version is successfully deployed and tested, traffic is switched to the updated environment, making it live, while the previous version becomes idle.
This strategy ensures that users experience minimal disruption during updates and provides a straightforward rollback mechanism in case any issues arise with the new version.