The fifty stars on the flag of the United States (USA) represent the 50 states and the 13 stripes represent the thirteen colonies that rebelled against the British monarchy and became the first states in the Union.

The national flag of the United States of America (or the American flag) consists of thirteen equal horizontal stripes of red (top and bottom) alternating with white, with a blue rectangle in the canton (referred to specifically as the “union”) bearing fifty small, white, five-pointed stars arranged in nine offset horizontal rows of six stars (top and bottom) alternating with rows of five stars. Nicknames for the flag include the “Stars and Stripes”, “Old Glory,” and “The Star-Spangled Banner” (also the name of the national anthem). Wikipedia