TypeScript is a statically typed JavaScript supplement that enhances development by catching common errors during development rather than at runtime. It provides better autocomplete suggestions and documentation while coding, making it easier for developers to write high-quality code. With TypeScript, you can set up a project in under 5 minutes with just a few commands, and it integrates seamlessly with popular frameworks such as React, Vue, and Angular. The language also offers features like type inference, interfaces, and error prevention that make coding more efficient and reliable. By learning TypeScript, developers can improve their productivity, reduce bugs in production code, and create more robust applications.