These classes increase the left margin of a column by * columns. For example, .col-md-offset-4 moves .col-md-4 over four columns.
<div class="row"> <div class="col-lg-4"></div> <div class="col-lg-4 col-lg-offset-4"></div> </div> <div class="row"> <div class="col-lg-5 col-lg-offset-1"></div> <div class="col-lg-5 col-lg-offset-1"></div> </div>