An "Expiration Date" is the date after which a product, such as food or medicine, is no longer guaranteed to be safe or effective. This date is determined by manufacturers based on factors like shelf life, storage conditions, and the nature of the product. Consuming items past this date can pose health risks. Expiration dates are commonly found on packaging, including canned goods, medications, and dairy products. It's important to check these dates to ensure safety and quality. Some products may still be usable after the expiration date, but their effectiveness or taste may diminish over time.