title: What are the important meta tags I must put in my website?
body: <p>There seems to be huge number of <a href="http://www.metatags.info/all_meta_tags" rel="noreferrer">meta tags</a> you can set. I'm guessing that some of them are more important than others. </p>
  
  <p>What are the most important metatags to supply and why?</p>
  
  <p>Do I even need meta tags? (looking at the stackoverflow homepage there are none)</p>