A warranty is a written guarantee provided by a manufacturer or seller that promises to repair or replace a product if necessary within a specified period. This assurance covers defects in materials or workmanship, ensuring that the item functions as intended. Warranties can vary in length and terms, depending on the product and the company. There are different types of warranties, including express warranties, which are clearly stated, and implied warranties, which are automatically assumed by law. For example, when you buy a new car, it typically comes with a warranty that covers certain repairs for a set number of years or miles.