GOROOT
The environment variable GOROOT indicates the Go language installation directory.
In windows, the default value of GOROOT is C:/go, while in macOS or Linux, the default value of GOROOT is usr/local/go. If you install Go in another directory, you need to change the value of GOROOT to the corresponding directory.
In addition, GOROOT/bin contains the toolchain that Go provides for us, so you should configure GOROOT/bin to the environment variable PATH so that we can use the Go toolchain globally.