React is a powerful JavaScript library designed for building user interfaces, and it comes packed with features that can significantly enhance your development experience. Here are 10 essential React features every developer should know:

1. Component-Based Architecture: React promotes the reuse of components, allowing developers to build encapsulated components that manage their own state.
2. JSX: JSX is a syntax extension that allows you to write HTML-like code within JavaScript, making your code more readable and easier to maintain.
3. Virtual DOM: React uses a virtual DOM to optimize rendering performance, ensuring that only the necessary components are updated instead of reloading the entire UI.

Continuing with the list of essential React features, consider the following:

4. State Management: React's built-in state management allows components to maintain their own state, which can be manipulated without affecting other components.
5. Lifecycle Methods: React components have lifecycle methods that allow developers to hook into different stages of a component’s life, such as mounting, updating, and unmounting.
6. Hooks: Introduced in React 16.8, hooks allow functional components to manage state and side effects, making them more powerful and easier to use than ever before.

Building responsive user interfaces with React Hooks involves leveraging the power of functional components alongside state and lifecycle management without the need for class components. Start by utilizing the useState hook to manage your component state, allowing for dynamic interactions. Consider implementing media queries in your CSS or using libraries like styled-components to create components that adapt to various screen sizes. This approach not only enhances user experience but also promotes maintainable and reusable code.

Another crucial aspect is utilizing the useEffect hook to handle side effects, such as fetching data or responding to prop changes. You can create custom hooks for shared logic across components, ensuring that your UI remains consistent and responsive to user actions. By following the principles of responsive design, like fluid grids and flexible images, you can ensure that your application provides an optimal viewing experience across a wide range of devices, thus making full use of the capabilities of React Hooks.

React has emerged as the go-to library for dynamic UI development due to its exceptional component-based architecture. This approach allows developers to create reusable UI components that encapsulate both logic and presentation. By breaking down the UI into manageable pieces, developers can easily maintain and modify their applications. Additionally, React's virtual DOM helps in optimizing performance by rendering only the components that have changed, thus providing a smooth user experience even in complex applications.

Another significant factor contributing to React's popularity is its robust ecosystem and supportive community. With a vast array of libraries, tools, and resources available, developers can enhance their applications quickly and efficiently. Furthermore, React's compatibility with other libraries and frameworks provides flexibility in project design. This adaptability, combined with a strong emphasis on one-way data binding, ensures better control over the flow of data, making React an ideal choice for modern dynamic UI development.