docs/data/reusables/repositories/deploy-keys.md

You can launch projects from a {% data variables.product.product_name %} repository to your server by using a deploy key, which is an SSH key that grants access to a single repository. {% data variables.product.product_name %} attaches the public part of the key directly to your repository instead of a personal user account, and the private part of the key remains on your server. For more information, see "Delivering deployments."