title: Pandas index names, axis labels, and levels
body: <p>Python for Data Analysis (2e, 219) says:</p>
  
  <p><a href="https://i.stack.imgur.com/1xkx1.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/1xkx1.png" alt="enter image description here"></a></p>
  
  <p>But I am, unfortunately, confused. So:</p>
  
  <ul>
  <li>What are "index names"? </li>
  <li>What are "axis labels"? </li>
  <li>What are "axis levels"?</li>
  <li>Which category do "rows" and "columns" fall into?</li>
  </ul>