info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
description: "Learn how to use GitLab CI/CD, the GitLab built-in Continuous Integration, Continuous Deployment, and Continuous Delivery toolset to build, test, and deploy your application."
at the repository's root. This file creates a [pipeline](pipelines/index.md), which runs for changes to the code in the repository. Pipelines consist of one or more stages that run in order and can each contain one or more jobs that run in parallel. These jobs (or scripts) get executed by the [GitLab Runner](https://docs.gitlab.com/runner/) agent.
While building your `.gitlab-ci.yml`, you can use the [CI/CD configuration visualization](pipeline_editor/index.md#visualize-ci-configuration) to facilitate your writing experience.
GitLab CI/CD and [shared runners](runners/README.md#shared-runners) are enabled on GitLab.com and available for all users, limited only by the [pipeline quota](../user/gitlab_com/index.md#shared-runners).
| [Schedule pipelines](pipelines/schedules.md) | Schedule pipelines to run as often as you need. |
| [Custom path for `.gitlab-ci.yml`](pipelines/settings.md#custom-ci-configuration-path) | Define a custom path for the CI/CD configuration file. |
| [Git submodules for CI/CD](git_submodules.md) | Configure jobs for using Git submodules. |
| [SSH keys for CI/CD](ssh_keys/README.md) | Using SSH keys in your CI pipelines. |
| [Pipeline triggers](triggers/README.md) | Trigger pipelines through the API. |
| [Pipelines for Merge Requests](merge_request_pipelines/index.md) | Design a pipeline structure for running a pipeline in merge requests. |
| [Integrate with Kubernetes clusters](../user/project/clusters/index.md) | Connect your project to Google Kubernetes Engine (GKE) or an existing Kubernetes cluster. |
| [Optimize GitLab and GitLab Runner for large repositories](large_repositories/index.md) | Recommended strategies for handling large repositories. |
| [`.gitlab-ci.yml` full reference](yaml/README.md) | All the attributes you can use with GitLab CI/CD. |
| [Browser Performance Testing](../user/project/merge_requests/browser_performance_testing.md) | Quickly determine the browser performance impact of pending code changes. |
| [Load Performance Testing](../user/project/merge_requests/load_performance_testing.md) | Quickly determine the server performance impact of pending code changes. |
| [CI services](services/README.md) | Link Docker containers with your base image. |
| [Code Quality](../user/project/merge_requests/code_quality.md) | Analyze your source code quality. |
| [GitLab CI/CD for external repositories](ci_cd_for_external_repos/index.md) **(PREMIUM)** | Get the benefits of GitLab CI/CD combined with repositories in GitHub and Bitbucket Cloud. |
| [Interactive Web Terminals](interactive_web_terminal/index.md) **(CORE ONLY)** | Open an interactive web terminal to debug the running jobs. |
| [Unit test reports](unit_test_reports.md) | Identify script failures directly on merge requests. |
| [Using Docker images](docker/using_docker_images.md) | Use GitLab and GitLab Runner with Docker to build and test applications. |
| [Canary Deployments](../user/project/canary_deployments.md) | Ship features to only a portion of your pods and let a percentage of your user base to visit the temporarily deployed feature. |
| [Deploy Boards](../user/project/deploy_boards.md) | Check the current health and status of each CI/CD environment running on Kubernetes. |
| [Container Scanning](../user/application_security/container_scanning/index.md) **(ULTIMATE)** | Check your Docker containers for known vulnerabilities. |
| [Dependency Scanning](../user/application_security/dependency_scanning/index.md) **(ULTIMATE)** | Analyze your dependencies for known vulnerabilities. |
| [License Compliance](../user/compliance/license_compliance/index.md) **(ULTIMATE)** | Search your project dependencies for their licenses. |
| [Security Test reports](../user/application_security/index.md) **(ULTIMATE)** | Check for app vulnerabilities. |
