Singleton Pattern:The Singleton is a creational design pattern that restricts the instantiation of a class to a single instance. This pattern is often used for things like log files, database connections, application configurations, and service accessors where it makes sense to only have one instance during the application's lifecycle. This pattern can be useful in sitations where system-wide actions need to be coordinated from a single central place. singleton.go main.go It's important to note that in a concurrent context, care must be taken to avoid race conditions when creating the singleton instance. Thread safe implementation: It's also worth noting that although Singleton is a great tool, it should be used sparingly. It can often be better to use dependency injection, which can make code more testable and less coupled.