JavaScript is considered the best language for web development for several reasons:

1. Versatility: JavaScript is a versatile language that can be used for both front-end and back-end development. It can be used to create interactive and dynamic websites, web applications, and server-side applications.

2. Popularity: JavaScript is one of the most popular programming languages in the world, with a large and active community of developers. This means that there are plenty of resources, libraries, and frameworks available to help developers build web applications quickly and efficiently.

3. Browser compatibility: JavaScript is supported by all major web browsers, making it an ideal choice for building cross-platform web applications that work seamlessly across different devices and browsers.

4. Speed: JavaScript is a high-performance language that can execute code quickly, making it ideal for building fast and responsive web applications.

5. Easy to learn: JavaScript is a beginner-friendly language that is relatively easy to learn and understand. This makes it a great choice for developers of all skill levels.

6. Integration with other technologies: JavaScript can easily be integrated with other technologies and frameworks, such as HTML, CSS, and various JavaScript libraries and frameworks like React, Angular, and Node.js.

Overall, JavaScript's versatility, popularity, browser compatibility, speed, ease of learning, and integration capabilities make it the best choice for web development.