What does a shield on a penny mean?

A shield on a penny symbolizes protection and unity. Introduced on the reverse of the U.S. cent in 2010, the shield design reflects the values of the nation, representing the American ideals of strength and security. The shield is adorned with 13 vertical stripes, symbolizing the original 13 colonies, and is topped with a banner that reads "E Pluribus Unum," highlighting the nation's unity in diversity.