title: what is "do_shortcode" in wordpress and how it works?
body: <p>I'm currently learning wordpress theme development and for better understanding I have downloaded couple of wordpress theme and seeing their code.
  But a line of code I can't understand. here it is--></p>
  
  <pre><code>&lt;?php echo do_shortcode(sq_option( 'footer_text ' ' ')); ?&gt;
  </code></pre>
  
  <p>maybe its for footer but how this works and how i can use this function when I will create my own.</p>