A URL is a Uniform Resource Locator, which is the address that identifies the location of a resource, such as a document or web page, on the Internet. A URL contains information about the organization hosting the website, the author or owner of the content, and often indicates the type of domain or country of origin through common domain name extensions like .com, .edu, .gov, .org, .au, etc. The URL allows both users and servers to easily locate and access resources on the World Wide Web.