Environments are a tagging system for deploying Prompts. They enable you to deploy maintain a streamlined deployment workflow and keep track of different versions of Prompts.
The default environment is your production environment. Everytime you fetch a Prompt, Tool, Dataset etc. without specifying an alternative environment or specific version, the version that is tagged with the default environment is returned.
You can rename an environment to re-arrange your development workflows. Since each new file is automatically deployed to the default environment, which is production unless altered, it may make more sense to create a separate production environment and rename your current environments.
Renaming the environments will take immediate effect, so ensure that this change is planned and does not disrupt your production workflows.