Answer 1

Go was created to solve “Google-sized” problems. As a general purpose language that specializes in concurrency, Go is especially useful for projects that involve distributed networks, cloud services, and other complex back-end technologies.
Go is a general purpose language so it can be used for almost anything. It has garbage collection so it is unsuitable for embedded or real-time software. Otherwise you can do whatever you want in it.
Go is very much designed with server-side development in mind. Channels, goroutines, non-blocking IO built-in—all point to the preference for creating highly concurrent servers. Go projects are either web applications, pure socket servers (games, streaming media, proxies, load balancers, &c.) or clients connecting to multiple servers (like web crawlers).