A UI kit provides developers with a set of reusable components that can be easily integrated into a website or application. These components are pre-designed with consistent styling and functionality, allowing developers to save time and effort in the design and development process. UI kits can be either custom-built or third-party, and often include components for buttons, forms, typography, icons, and more.
Storybook is a tool for developing and testing UI components in isolation. It provides a sandbox environment where you can experiment with different props and states to see how your component responds.