You should edit the module, click Toggle Editor button. Html code should be:
<div class="row">
<div class="col-sm-6">
<div class="banner-box"><img src="images/adv-1.jpg" alt="adv" />
<div class="text">
<h3>Sale of summer</h3>
<p>Lorem ipsum dolor sit amet</p>
<a class="more" href="index.php/shop/product-category">Shop now</a></div>
</div>
</div>
<div class="col-sm-6">
<div class="banner-box"><img src="images/adv-2.jpg" alt="adv" />
<div class="text">
<h3>Jacket for women</h3>
<p>Lorem ipsum dolor sit amet</p>
<a class="more" href="index.php/shop/product-category">Shop now</a></div>
</div>
</div>
</div>
Change image with your image.
joomfreak