A free update refers to an addition or modification made available at no extra cost to users who already own a product. This means that once you have purchased a software, game, operating system, or other digital content, any new features, improvements, bug fixes, security patches, and other enhancements will be provided to you without requiring further payment. Essentially, it is an effort by the developer or publisher to keep their customers up-to-date with the latest version of the product while also providing ongoing support and value for money.