title: What is difference between Xvfb and Chromedriver and when to use them
body: <p>Hi I am planning to setup selenium to test my web application.</p>
  
  <p>I have read that both chromedriver and Xvfb can be used to run the tests.
  I have also read that Xvfb can be configured to use chromdriver.</p>
  
  <p>So that got me confused. What role does chromedriver and Xvfb in runnning the selenium tests.</p>
  
  <p>Thanks</p>