The location of a webpage or file on the Internet. Some of Google's URLs include www.google.com, adwords.googleblog.com, and http://www.google.com/intl/en/privacy.

• Just as buildings and houses have a street address, webpages also have unique addresses to help people locate them. On the Internet, these addresses are called URLs (Uniform Resource Locators).
• A webpage's URL—such as http://support.google.com/google-ads—is made up of a domain name (here it's "google"), a domain category (".com"), and sometimes other elements like a subdomain ("support") and path ("/google-ads").
• For each of your ads, you specify a display URL that's shown with your ad as well as a final URL that determines where people are taken when they click your ad.
• To find a webpage's URL, look in the address bar near the top of your Internet browser.

Display URL policy
How to edit your URLs

* Nguồn: Google