<div class="container mt-5">
<div class="row align-items-center">
  <div class="col-md-6">
    <h2>title</h2>
    <p class="d-md-none"><img src="//dummyimage.com/400x240" alt=""></p>
    <p>desctiption</p>
  </div>  
  <div class="d-none d-md-block col-md-6"><img src="//dummyimage.com/400x240" alt=""></div>
</div>
</div>

External CSS

  1. https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.3/css/bootstrap.min.css

External JavaScript

This Pen doesn't use any external JavaScript resources.