<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <div class="visible-lg"><!-- Visible lg For Desktops --> Ad 1 for PCs </div><!-- End of Visible lg For Desktops --> <div class="hidden-lg"><!-- Hidden lg for Ipads, phones etc --> Ad 2 fo tablets and phones </div><!-- End of Hidden lg --> </div> <!-------- end of row --> </div> <!-- end of container --> </div> </div>