title: What is the difference between describe() and it() in spec.js file in protractor?
body: <p>When writing the test case in spec.js file in protractor then 2 fields are showing describe() and it(). what exactly the use of them and when to use?</p>
  
  <p>// spec.js</p>
  
  <pre><code>describe('Protractor Demo App', function() {
    it('should have a title', function() {
      ..
    });
  });
  </code></pre>