A development stack refers to a combination of programming languages, frameworks, libraries, and tools used to build software applications. It typically includes both front-end technologies, which handle the user interface, and back-end technologies, which manage server-side operations and databases. Common examples of development stacks include the MEAN stack (MongoDB, Express.js, Angular, Node.js) and the LAMP stack (Linux, Apache, MySQL, PHP). Choosing the right development stack is crucial for a project's success, as it affects performance, scalability, and maintainability. Developers often select stacks based on the specific needs of the application, team expertise, and community support. A well-chosen stack can streamline the development process and enhance collaboration among team members.