In soccer, a yellow card is a disciplinary action given by the referee to a player as a warning for committing a cautionable offense. It serves as an official caution and is displayed by the referee by showing a yellow card to the offending player. A yellow card can be given for various reasons, such as reckless challenges, unsporting behavior, dissent, time-wasting, or persistent fouling. If a player receives two yellow cards in the same match, they will be shown a red card and be sent off the field, resulting in their team being reduced to ten players for the remainder of the match. Additionally, accumulating a certain number of yellow cards over multiple matches can lead to suspensions or other disciplinary consequences, depending on the competition’s rules.