Go 1.24, released in Feb '25, adds the new weak package to the standard library. The package brings weak pointers to the language for the first time. These lightweight references allow developers to manage memory more efficiently, allowing garbage collection of variables even when referenced.With weak pointers, you can write more memory-efficient caching, track values with observers without preventing their cleanup, and build powerful data structures such as canonicalisation maps. As with similar features in C++ and other languages, we can learn to navigate the quirks of this new item in the Go developer's toolbox.Join us for an overview of the anatomy of the weak package, and to discover how weak pointers can help you write memory-efficient Go.