URL is an abbreviation for "Uniform Resource Locator."
The URL is how we find things on the web. From a user perspective, it's the web address that you type in to your browser in order to get to a web page.
Modern day browsers like Chrome have tried to do away with the concept of the URL, from a user perspective. They want users to send every query, every web address even, through their Google search engine. This is a way of tracking more information about their customers' web usage habits.
However, Google is not the only way to reach web pages. You can still type the URL into the URL bar. For instance:
As you can see, www.emblazonjava.com is entered in the URL bar at the top.
More in depth, the URL has highly specific meaning in the technical world. Web developers think of everything on the web as a resource that can be accessed and acted upon.
For instance, http://www.emblazonjava.com/what-is-a-url.html is considered to be the location on the web of a file named what-is-a-url.html. It is just a file of pretty pictures and words that your browser displays really nicely.