Definition & Meaning of "booster pack"

What is a "booster pack"?

A booster pack is a sealed package of additional cards used in collectible card games, such as Pokémon. These packs typically contain a random selection of cards, often including a mix of common, uncommon, and rare cards. Booster packs are sold separately from the main game set and are designed to allow players to expand their collection, customize their decks, or discover new cards. The contents of each booster pack are random, which adds an element of surprise and excitement for players looking to build stronger or more diverse decks.