Queen Elizabeth II has reigned over the British Empire for more than 60 years. Her monarchy has been characterized by grace and class. She has diligently given her life to serve her people well, and as a result she is deeply loved and highly revered. So, you can understand the importance of the flag flying above Buckingham Palace. When the flag is flying, it means that she is in residence in the heart of London. The flag is a public statement that the queen is present with her people.