As listed on the blog page - https://blog.golang.org/go1.11 - two exciting features are modules and WebAssembly support.

Information about modules can be found at:

- https://golang.org/cmd/go/#hdr-Preliminary_module_support

- https://github.com/golang/go/wiki/Modules

- https://research.swtch.com/vgo

The wiki - https://golang.org/wiki/WebAssembly - provides information on how to get started with using Wasm with Go.