In 1776 the Continental Congress formed a committee to design a seal of united states of america although it was the June 20, 1782 when it came to the public. Heraldic devices in everything that composes colors, drawings, etc ... have meaning.
White signifies purity and innocence, red resistance value and the blue color of the head.
Broadband over stripes monitoring means perseverance and justice also the star is a symbol of the heavens and the band are light rays given off by the sun.
Placing a strip on the US flag is optional by the person in the organization.
The fringes are used in indoor flags being outdoors deteriorate very quickly.
The gold trim is used in indoor flags for ceremonies.