Not a Golang dev myself, but I'd characterize it as server-side applications with high concurrency demands.

Most use cases I see tend to deal with either (1) microservices or (2) modern virtualization solutions, e.g. Docker, Kubernetes. This isn't quite universal though: there are exceptions like CockroachDB and Container Linux.

Ex Amazon here. Most cloud automation across various large companies is written in C, sometimes C++, with plenty of glue code in higher level languages like Python.

Hyped up stuff like Docker & co are the few written in Go and often not mature and stable enough for enterprise.

Mostly google cloud hosted high performance web services.