title: Can meta tag description be declared dynamically in a web page
body: <p>I have a dynamic page, where the contents and title will change based on the parameters in the URL.  I want the same to be done for meta tag description. As I don't have a sound knowledge of SEO, I don't know whether it will be valid or not.<br>
  Say suppose URL contains word <strong>"test"</strong><br>
  I will do,  </p>
  
  <pre><code>if("test" is present)
  {
  &lt;title&gt;test&lt;/test&gt;
  &lt;meta decription="test"/&gt;
  }
  else
  {
  &lt;title&gt;test1&lt;/test&gt;
  &lt;meta decription="test1"/&gt;
  
  }
  </code></pre>
  
  <p>Can I do this? Does giving two meta tag descriptions for same page work.</p>