URL means Universal Resource Locator

URL stands for Uniform Resource Locator and it points to
resource files on the Internet.
  URL has four components.
http://www.allinterview.com:80/index.html
http - protocol name,
allinterview - IP address or host name,
80 - port number,
index.html - file

url is a uniform or universal resource locator(An Internet
World Wide Web Address.)...which is used to find the web
pages....It includes the protocol, the domain and the name
of the file.