Yarn is an amazing technology for developers to add to their toolkit. It is a fast, reliable, and secure package manager that helps developers quickly find, share, and use code packages. Yarn uses checksums to guarantee that installed packages are identical to the original package, ensuring that the code you use is reliable and secure. Yarn is also incredibly fast, utilizing an offline cache to eliminate the need to download from the registry on every install. With Yarn, developers also get a consistent experience across different machines, ensuring that the same versions of packages are installed on each development machine. Yarn is an essential tool for developers to ensure quality code and faster development time.