title: What does the agent mean in jenkins?
body: <p>I am trying to use jenkins. But when I reading the Declarative Pipeline Syntax, I confused by the <code>agent</code> term</p>
  <ul>
  <li><a href="https://jenkins.io/doc/book/pipeline/syntax/#scripted-pipeline" rel="noreferrer">https://jenkins.io/doc/book/pipeline/syntax/#scripted-pipeline</a></li>
  </ul>
  <ol>
  <li>What does the agent stand for?</li>
  <li>Is that mean I can set the pipeline runtime folder path?</li>
  <li>How to create an agent?</li>
  <li>How set a label for agent?</li>
  </ol>