title: How to customize the Image shown when posting a URL of a website on Social Media sites
body: <p>I have seen that when we put a url of a website, an image appears for that URL. Examples include social media sites Like Google+, Facebook, Instagram. I need to know how to add such an image to my website. Is there a certain tag Or script that should be applied to show that image?</p>
  
  <p><img src="https://i.stack.imgur.com/VRSjN.png" alt=""></p>
  
  <p>When I share my website link I don't get such a one. I need to know why and how to do it.</p>