The phrase "Sweet Home" is an expression that means "home sweet home." It's a term used to describe the feeling of warmth, comfort and happiness when you are in your own place. The word 'Home' refers to the place where one lives or resides while ‘Sweet’ implies something pleasant, agreeable, delightful, charming, lovely, etc., thus combining both words creates a phrase that means coming back home is like returning to a warm and comfortable place after being away for some time.