title: What does it means call a task with a colon in gulp?
body: <p>I would like to know what is the use of <code>:</code> colon when used as follow in a gulp task.</p>
  
  <ul>
  <li>Does it pass a parameters?</li>
  </ul>
  
  <hr>
  
  <pre><code>gulp.task('default', ['clean:mobile']);
  </code></pre>