Jira environments

[Madhan Mohan]

how the environments were in set in jira.Example if we open deployments there we can see test stage dev and prod.How it has been configured

[Brant Schroeder]

@Madhan Mohan Welcome to the Atlassian community

Cloud allows you to have a sandbox when you are on premium or enterprise plans.  

Your sandbox URL is created based on the production site URL. For example, if your production site URL is acme.atlassian.net, your sandbox site URL could be acme-sandbox-123.atlassian.net. Learn how to change your product and site URL

You can learn more about sandbox here: https://support.atlassian.com/organization-administration/docs/manage-atlassian-product-sandboxes/