CI/CD variables are applied to environments via the runner and can be set from the project’s Settings > CI/CD page.
The values are encrypted using aes-256-cbc and stored in the database.
This data can only be decrypted with a valid secrets file.
If you didn't find what you were looking for,
search the docs.
If you want help with something specific and could use community support,
post on the GitLab forum.
For problems setting up or using this feature (depending on your GitLab