"Winter is coming" is a famous phrase from the "Game of Thrones" series by George R.R. Martin. It's a reminder that harsh and difficult times lie ahead, as winters in the world of Westeros can be long and brutal. In real life, it's a reminder to prepare for the colder months by staying warm, ensuring your home is ready for winter, and maybe even enjoying some winter activities like skiing or sipping hot cocoa by the fire. Stay cozy!