For example, you could be asking about:
* The United States flag: This flag has 50 white stars arranged in a blue rectangle in the upper left corner, representing the 50 states.
* The European Union flag: This flag has a circle of 12 gold stars on a blue field, representing the unity of Europe.
* The flag of Australia: This flag has a Union Jack in the upper left corner and five white stars in the lower right corner, representing the Southern Cross constellation.
To give you a better answer, please tell me which flag you're interested in.