title: Display an article rating in Google search results
body: <p>Im writing a review site where the community rates posts. I have noticed that Google can pick up on this ratings and display them in its search results. Does anyone know how this is achieved?</p>
  
  <p>An example is a review site like IGN, where in their screen shot below they have indicated their review has a rating of 9.3/10.</p>
  
  <p><img src="https://i.stack.imgur.com/XEhrK.png" alt="enter image description here"></p>
  
  <p>How can I indicate to Google my own review rating? Maybe some sort of custom meta tag or something.</p>