One of the best practices for micro frontends is to use a common design system. A design system is a collection of reusable components, guidelines, and standards that help teams create consistent and cohesive user interfaces. By using a common design system, micro frontend teams can ensure that their user interfaces are consistent with each other, even if they are developed by different teams or technologies. This consistency can improve the user experience and reduce development time and costs.

For example, let's say that a company has multiple micro frontends that are developed by different teams. Each team has its own design and development process, which can result in different user interfaces across the micro frontends. This can be confusing for users and can lead to a disjointed user experience. By using a common design system, the teams can ensure that their user interfaces are consistent with each other. This can improve the user experience and make it easier for users to navigate between the micro frontends.

Another benefit of using a common design system is that it can reduce development time and costs. Instead of each team developing their own components and styles, they can reuse components and styles from the design system. This can save time and reduce the risk of errors and inconsistencies. Additionally, a common design system can make it easier to onboard new team members, as they can quickly learn the design and development standards of the organization.