Containerization is a transformative technology that encapsulates software applications and their dependencies into isolated units called containers. This approach ensures that applications run consistently across various computing environments, from development to production. Unlike traditional virtualization, which relies on hypervisors to create virtual machines, containerization operates at the operating system level, allowing for more efficient resource utilization. Docker is one of the most popular tools for managing containers, simplifying the process of creating, deploying, and orchestrating containerized applications. By adopting containerization, organizations can enhance scalability, streamline deployment processes, and improve overall application resilience.