Why did the American flay change?

The American flag changed primarily to reflect the admission of new states into the Union. Originally, the flag had 13 stripes and stars, representing the original colonies; however, as new states joined, additional stars were added while the number of stripes was fixed at 13. The most significant redesign occurred in 1960 when Hawaii became the 50th state, resulting in the current flag's 50 stars arranged in nine rows of alternating five and six stars. This evolution symbolizes the growth and unity of the nation over time.