What does the pokeball mean on a Pokemon card?

The pokeball on a Pokemon card indicates the rarity of the card. A pokeball with a red background indicates that the card is a common card, a pokeball with a silver background indicates that the card is an uncommon card, and a pokeball with a gold background indicates that the card is a rare card. The pokeball symbol can also be found on some holofoil cards, which are considered to be even rarer than rare cards.