Card skimming is a type of fraud where criminals use a small device, called a skimmer, to capture the information from a credit or debit card's magnetic stripe. This device is often placed on ATMs or point-of-sale terminals, making it difficult for users to notice. When a card is swiped, the skimmer records the card details, which can then be used to make unauthorized transactions. To protect against card skimming, it's important to inspect ATMs and card readers for any unusual attachments or signs of tampering. Additionally, using chip cards and monitoring bank statements regularly can help detect any fraudulent activity early.