# Reference for GitHub Actions

Find information to apply to your work with GitHub Actions.

## Links

* [Workflows and actions reference](/en/actions/reference/workflows-and-actions)

  Find information on workflows and actions in GitHub Actions.

* [Runners reference](/en/actions/reference/runners)

  Find information on the machines that execute jobs in GitHub Actions.

* [Security reference](/en/actions/reference/security)

  Find information about keeping your work with GitHub Actions secure.

* [Actions limits](/en/actions/reference/limits)

  There are limits in GitHub Actions which you may hit as you scale up, some may be increased by contacting support.

* [GitHub Actions Importer reference](/en/actions/reference/github-actions-importer)

  Find information on migrating your CI/CD pipeline to GitHub Actions with the GitHub Actions Importer.