Rust is a programming language that is focused on safety, speed, and concurrency. It is designed to be memory safe and protect against data races, which can cause unexpected behavior and crashes. Rust is also designed to be fast, allowing developers to get the most out of their hardware. Additionally, Rust has excellent support for concurrent programming, making it ideal for developing programs that need to take advantage of multiple cores or processors. Rust is gaining popularity among JavaScript developers who are looking for a more powerful and reliable language for their projects.