GitLab CI/CD is a built-in continuous integration and continuous deployment (CI/CD) tool that is part of the GitLab platform. It enables developers to automate the building, testing, and deployment of applications, and it supports various programming languages, frameworks, and platforms. GitLab CI/CD is based on the concept of pipelines, which are defined using a YAML file and can be triggered by code changes, merge requests, or schedules. It provides a web-based UI for managing pipelines, and it supports parallel execution, caching, and artifacts. GitLab CI/CD integrates with GitLab's version control, issue tracking, and code review features, enabling developers to manage the entire software development lifecycle within a single platform. It also supports GitOps practices, enabling developers to define and control application configurations through Git repositories. GitLab CI/CD is widely adopted in the DevOps ecosystem due to its ease of use, scalability, and support for modern software development practices. It is a fundamental tool for building and deploying modern applications and is a key enabler of CI/CD and GitOps practices. GitLab CI/CD is a critical component of the DevOps landscape and is widely used in the software development industry. It has a strong community and ecosystem of tools and platforms that support its adoption. GitLab CI/CD is a key technology for enabling modern software development practices and is a critical component of the cloud-native landscape.