Micro-frontends is a modern architectural approach that divides the user interface of an application into smaller, self-contained units, each with its own distinct technology stack and development team. Each micro-frontend is responsible for rendering a specific part of the UI and can be independently deployed, updated, and scaled. This allows for greater flexibility and scalability, as well as faster development cycles. It also enables teams to use different frameworks and libraries for different parts of the application, allowing them to focus on the best tools for the job.